{"product_id":"cw217-rio-tomo-concolor-cory-catfish-hoplisoma-sp-cw217","title":"CW217 Rio Tomo Concolor Cory Catfish – Hoplisoma sp. CW217","description":"\u003cdiv class=\"tropicflow-product-description\" style=\"max-width: 920px; margin: 0 auto; font-size: 16px; line-height: 1.7; color: #333;\"\u003e\n\n  \u003c!-- QUICK ANSWER --\u003e\n  \u003cdiv style=\"background: #f5faf8; border-left: 4px solid #016141; padding: 18px 20px; margin: 0 0 28px 0; border-radius: 4px;\"\u003e\n    \u003cstrong style=\"color: #016141; font-size: 18px;\"\u003eQuick Answer:\u003c\/strong\u003e\n    \u003cp style=\"margin: 8px 0 0 0;\"\u003e\n      The \u003cstrong\u003eCW217 Rio Tomo Concolor Cory Catfish (Hoplisoma sp. CW217)\u003c\/strong\u003e\n      is a recently introduced and still undescribed collector Cory from a tributary\n      of the \u003cstrong\u003eRio Tomo in eastern Colombia\u003c\/strong\u003e. Closely resembling the\n      Slate Cory (\u003cem\u003eHoplisoma concolor\u003c\/em\u003e) in body shape, CW217 stands apart through\n      its more contrasting \u003cstrong\u003etwo-tone coloration\u003c\/strong\u003e and distinctive locality.\n      Adults reach approximately \u003cstrong\u003e2.25–2.75 inches\u003c\/strong\u003e and should be kept\n      in groups of at least \u003cstrong\u003e6 fish\u003c\/strong\u003e, with larger groups preferred.\n      Provide fine sand, clean oxygen-rich water, natural cover, and peaceful tank mates.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- INTRO --\u003e\n  \u003cp\u003e\n    The \u003cstrong\u003eCW217 Rio Tomo Concolor Cory Catfish (Hoplisoma sp. CW217)\u003c\/strong\u003e\n    is one of the newest specialty Cory-type catfish to enter the aquarium hobby.\n    First widely documented from recent Colombian imports, this unusual fish immediately\n    attracted attention because it combines the familiar deep-bodied appearance of the\n    Slate Cory with a much more contrasting color pattern.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Also known as the \u003cstrong\u003eRio Tomo Cory\u003c\/strong\u003e,\n    \u003cstrong\u003eRio Tomo Concolor Cory\u003c\/strong\u003e,\n    \u003cstrong\u003eTwo-Tone Concolor Cory\u003c\/strong\u003e, or simply\n    \u003cstrong\u003eCW217 Cory\u003c\/strong\u003e, this fish comes from a small tributary of the\n    Rio Tomo in eastern Colombia.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    The fish is generally described as having an olive, bronze, slate-gray, or\n    metallic anterior body with warmer brown, rust, orange, or reddish tones becoming\n    more visible toward the rear of the body and fins. Individual coloration can vary\n    with age, sex, lighting, stress, and overall condition.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    \u003cstrong\u003eTaxonomy note:\u003c\/strong\u003e CW217 has not yet received a formal species\n    description and should therefore be listed as\n    \u003cstrong\u003e\u003cem\u003eHoplisoma sp. CW217\u003c\/em\u003e\u003c\/strong\u003e. It is clearly very close to\n    \u003cem\u003eHoplisoma concolor\u003c\/em\u003e, but current specialist information treats CW217 as\n    a geographically distinct Rio Tomo population rather than simply assuming it is\n    the same species. Until formal taxonomic work is completed, the CW217 designation\n    is the most useful and accurate identification.\n  \u003c\/p\u003e\n\n  \u003c!-- INFORMATION TABLE --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    CW217 Rio Tomo Concolor Cory Care Information\n  \u003c\/h2\u003e\n\n  \u003cdiv style=\"overflow-x: auto; margin: 18px 0 30px 0;\"\u003e\n    \u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 520px;\"\u003e\n      \u003ctbody\u003e\n\n        \u003ctr\u003e\n          \u003cth style=\"background: #016141; color: #fff; text-align: left; padding: 12px 14px; border: 1px solid #ddd; width: 38%;\"\u003e\n            Care Requirement\n          \u003c\/th\u003e\n          \u003cth style=\"background: #016141; color: #fff; text-align: left; padding: 12px 14px; border: 1px solid #ddd;\"\u003e\n            CW217 Rio Tomo Cory Information\n          \u003c\/th\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eCommon Name\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            Rio Tomo Concolor Cory, Rio Tomo Cory, Two-Tone Concolor Cory\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr style=\"background: #f8f8f8;\"\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eScientific \/ Hobby Name\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            \u003cem\u003eHoplisoma sp. CW217\u003c\/em\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eAffinity\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            \u003cem\u003eHoplisoma sp. aff. concolor\u003c\/em\u003e\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr style=\"background: #f8f8f8;\"\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eCW Number\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            CW217\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eStatus\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            Undescribed Corydoradinae Form\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr style=\"background: #f8f8f8;\"\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eAdult Size\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            Males ~2.25 inches; Females up to ~2.75 inches\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eTemperature\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            71–77°F (22–25°C)\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr style=\"background: #f8f8f8;\"\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003epH Range\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            6.0–7.5\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eWater Preference\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            Clean, Soft to Moderately Soft Water\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr style=\"background: #f8f8f8;\"\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eRecommended Tank Size\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            30+ Gallons Recommended\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eRecommended Group Size\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            6+ Minimum; 8+ Preferred\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr style=\"background: #f8f8f8;\"\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eTemperament\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            Peaceful \u0026amp; Social\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eDiet\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            Omnivore \/ Benthic Forager\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr style=\"background: #f8f8f8;\"\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eTank Level\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            Bottom Dweller\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eCare Level\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            Intermediate\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr style=\"background: #f8f8f8;\"\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 11px 14px; border: 1px solid #ddd;\"\u003e\n            Caño Negro, Tributary of the Rio Tomo, Eastern Colombia\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- APPEARANCE --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    What Does a CW217 Rio Tomo Concolor Cory Look Like?\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    The \u003cstrong\u003eCW217 Rio Tomo Cory\u003c\/strong\u003e has a robust, short-snouted body\n    shape very similar to the classic Slate Cory,\n    \u003cem\u003eHoplisoma concolor\u003c\/em\u003e.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Its coloration, however, is noticeably more contrasting. The front half\n    of the body is often described as\n    \u003cstrong\u003eslate-gray, metallic gray, olive, bronze, or bluish-gray\u003c\/strong\u003e,\n    while warmer brown, rust, copper, orange, or reddish tones may become\n    increasingly visible toward the rear portion of the fish and its fins.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    This creates the characteristic \u003cstrong\u003etwo-tone appearance\u003c\/strong\u003e\n    that has made CW217 especially desirable among Cory collectors.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Individual intensity can vary considerably. Aquarium lighting,\n    substrate color, maturity, sex, shipping stress, diet, and overall\n    condition can all affect how strongly the contrasting colors appear.\n  \u003c\/p\u003e\n\n  \u003c!-- TWO TONE --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    Why Is CW217 Called the Two-Tone Concolor Cory?\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    CW217 closely resembles \u003cem\u003eHoplisoma concolor\u003c\/em\u003e in overall body\n    shape but displays a much stronger division between cooler metallic\n    body tones and warmer coloration toward the rear.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    This contrasting appearance led aquarists to use names such as\n    \u003cstrong\u003eTwo-Tone Concolor Cory\u003c\/strong\u003e and\n    \u003cstrong\u003eRio Tomo Concolor Cory\u003c\/strong\u003e.\n  \u003c\/p\u003e\n\n  \u003cdiv style=\"background: #f5faf8; border-left: 4px solid #016141; padding: 18px 20px; margin: 26px 0;\"\u003e\n    \u003cstrong style=\"color: #016141;\"\u003eCW217 Color Feature:\u003c\/strong\u003e\n    \u003cp style=\"margin: 7px 0 0 0;\"\u003e\n      CW217 is prized for its \u003cstrong\u003estronger two-tone coloration compared\n      with typical Hoplisoma concolor\u003c\/strong\u003e. Expect natural individual\n      variation rather than identical colors on every fish.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- CW217 VS CONCOLOR --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    CW217 Rio Tomo Cory vs. Slate Cory\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    The \u003cstrong\u003eCW217 Rio Tomo Cory\u003c\/strong\u003e is extremely similar in body\n    shape to the \u003cstrong\u003eSlate Cory (Hoplisoma concolor)\u003c\/strong\u003e, which is\n    why early hobby references commonly describe it as\n    \u003cem\u003eHoplisoma sp. aff. concolor\u003c\/em\u003e.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    The major visible difference is coloration. Typical\n    \u003cem\u003eH. concolor\u003c\/em\u003e tends to display relatively uniform slate-gray,\n    olive, brown, or bronze coloration.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    CW217 displays a much more obvious contrasting or\n    \u003cstrong\u003etwo-tone color pattern\u003c\/strong\u003e. According to information from\n    the original importer, fish displaying the CW217 coloration were not\n    found mixed among ordinary \u003cem\u003eH. concolor\u003c\/em\u003e.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    For this reason, CW217 should not simply be labeled\n    \u003cem\u003eHoplisoma concolor\u003c\/em\u003e until formal taxonomic work confirms its\n    relationship.\n  \u003c\/p\u003e\n\n  \u003c!-- NEW FORM --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    Is CW217 a New Cory Catfish?\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    CW217 is a very recent addition to the aquarium hobby.\n    The fish received the \u003cstrong\u003eCW217\u003c\/strong\u003e identification code in 2025\n    after newly imported specimens attracted attention from Cory specialists.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    It remains an \u003cstrong\u003eundescribed form\u003c\/strong\u003e, meaning that no formal\n    scientific species description has yet established whether it represents\n    a separate species, a geographically isolated population, or another\n    taxonomic form closely related to \u003cem\u003eHoplisoma concolor\u003c\/em\u003e.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Until that work is completed, \u003cstrong\u003eHoplisoma sp. CW217\u003c\/strong\u003e\n    is the most appropriate name for aquarium use.\n  \u003c\/p\u003e\n\n  \u003c!-- WHAT CW217 MEANS --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    What Does CW217 Mean?\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    \u003cstrong\u003eCW217\u003c\/strong\u003e is the identification number assigned to this\n    fish through the Corydoras World CW-number system.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    CW numbers allow aquarists, breeders, importers, and researchers to\n    consistently identify undescribed Corydoradinae populations before\n    they receive formal scientific species names.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Maintaining the CW217 designation is particularly important because\n    the fish is closely related to other concolor-like Corys and could\n    otherwise be easily confused with them.\n  \u003c\/p\u003e\n\n  \u003c!-- RARE --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    Is the CW217 Rio Tomo Cory Rare?\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    CW217 remains a \u003cstrong\u003erare specialty fish in the aquarium trade\u003c\/strong\u003e.\n    The initial known imports consisted of relatively small numbers of\n    wild-collected fish, and availability remains much more limited than\n    established species such as Panda, Bronze, Sterbai, or Slate Corys.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    As captive breeding becomes established, aquarium availability may\n    eventually increase.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    The term “rare” here refers to\n    \u003cstrong\u003ecurrent aquarium-trade availability\u003c\/strong\u003e and should not\n    automatically be interpreted as a conservation-status classification.\n  \u003c\/p\u003e\n\n  \u003c!-- BEHAVIOR --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    CW217 Rio Tomo Cory Behavior \u0026amp; Group Size\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    CW217 Corys are \u003cstrong\u003epeaceful, social bottom-dwelling fish\u003c\/strong\u003e\n    and should not be maintained alone.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Keep at least \u003cstrong\u003e6 CW217 Rio Tomo Corys\u003c\/strong\u003e together.\n    Groups of \u003cstrong\u003e8 or more\u003c\/strong\u003e are preferred whenever aquarium\n    size and availability allow.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    A proper group encourages more confident behavior and allows the fish\n    to forage, rest, and explore together naturally.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Like other Cory-type catfish, CW217 may occasionally swim rapidly to\n    the surface to gulp atmospheric air before returning to the bottom.\n    Occasional surface visits are normal.\n  \u003c\/p\u003e\n\n  \u003c!-- TANK SETUP --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    Ideal Aquarium Setup for CW217 Rio Tomo Concolor Cory\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    Because mature females may approach \u003cstrong\u003e2.75 inches\u003c\/strong\u003e,\n    a \u003cstrong\u003e30-gallon or larger aquarium\u003c\/strong\u003e is recommended for a\n    proper group.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Prioritize horizontal bottom space rather than tank height.\n    A longer aquarium gives these active Corys more room to forage together.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    A \u003cstrong\u003efine sand substrate\u003c\/strong\u003e is highly recommended.\n    Cory-type catfish naturally use their barbels and snouts to search\n    through the substrate for food.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Driftwood, smooth stones, roots, dried leaves, and live plants can\n    provide shelter while open sections of sand give the group plenty\n    of usable foraging space.\n  \u003c\/p\u003e\n\n  \u003c!-- HABITAT --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    Natural Habitat of the CW217 Rio Tomo Cory\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    Current locality information indicates that CW217 comes from a\n    \u003cstrong\u003esmall tributary of the Rio Tomo in eastern Colombia\u003c\/strong\u003e.\n    Local collectors refer to the tributary as \u003cstrong\u003eCaño Negro\u003c\/strong\u003e.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    The water at the collection locality has been described as\n    \u003cstrong\u003eclear or crystal-clear\u003c\/strong\u003e. The Rio Tomo itself belongs\n    to the greater \u003cstrong\u003eOrinoco River system\u003c\/strong\u003e.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Importer information also indicates that CW217 was the only Cory-type\n    armored catfish found at that specific collection site and that typical\n    \u003cem\u003eHoplisoma concolor\u003c\/em\u003e was not present there.\n  \u003c\/p\u003e\n\n  \u003c!-- WATER --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    CW217 Rio Tomo Cory Water Parameters\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    Current specialist aquarium records recommend approximately\n    \u003cstrong\u003e71–77°F (22–25°C)\u003c\/strong\u003e with a pH around\n    \u003cstrong\u003e6.0–7.5\u003c\/strong\u003e.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Because CW217 is newly imported and species-specific ecological data\n    remain limited, aquarists should prioritize\n    \u003cstrong\u003eclean, stable, oxygen-rich water\u003c\/strong\u003e rather than attempting\n    extreme water chemistry.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Keep the aquarium fully cycled with effective biological filtration.\n    Ammonia and nitrite should remain at zero, and sudden changes in\n    temperature or water chemistry should be avoided.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Regular water changes and a clean substrate are especially important\n    for wild-origin or recently imported collector Corys.\n  \u003c\/p\u003e\n\n  \u003c!-- DIET --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    What Do CW217 Rio Tomo Cory Catfish Eat?\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    Species-specific dietary studies have not yet been published for CW217,\n    but its feeding requirements are consistent with other\n    \u003cem\u003eHoplisoma\u003c\/em\u003e Corys.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Feed a varied diet containing quality sinking foods along with\n    appropriately sized frozen or live foods such as:\n  \u003c\/p\u003e\n\n  \u003cul style=\"padding-left: 22px;\"\u003e\n    \u003cli\u003eHigh-quality sinking Cory pellets\u003c\/li\u003e\n    \u003cli\u003eBottom-feeder tablets\u003c\/li\u003e\n    \u003cli\u003eBloodworms\u003c\/li\u003e\n    \u003cli\u003eBlackworms\u003c\/li\u003e\n    \u003cli\u003eBrine shrimp\u003c\/li\u003e\n    \u003cli\u003eDaphnia\u003c\/li\u003e\n    \u003cli\u003eTubifex\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\n    Wild-origin fish may respond especially well to frozen or live foods\n    during the initial acclimation period before readily accepting prepared diets.\n  \u003c\/p\u003e\n\n  \u003cdiv style=\"background: #fff8e8; border-left: 4px solid #d49a17; padding: 16px 18px; margin: 20px 0;\"\u003e\n    \u003cstrong\u003eImportant:\u003c\/strong\u003e CW217 Rio Tomo Corys should not be purchased\n    simply as aquarium “cleaner fish.” They require intentional feeding with\n    a complete diet. Cory catfish do not replace regular water changes,\n    substrate cleaning, and normal aquarium maintenance.\n  \u003c\/div\u003e\n\n  \u003c!-- TANK MATES --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    CW217 Rio Tomo Cory Tank Mates\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    The peaceful temperament of\n    \u003cstrong\u003eHoplisoma sp. CW217\u003c\/strong\u003e makes it suitable for carefully\n    planned freshwater community aquariums.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Potential tank mates may include peaceful tetras, pencilfish,\n    rasboras, danios, peaceful dwarf cichlids, other compatible Cory-type\n    catfish, and other non-aggressive freshwater fish that share similar\n    temperature and water requirements.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Avoid large predatory fish, aggressive bottom dwellers, and excessively\n    competitive species that may intimidate CW217 or prevent the group\n    from receiving enough food.\n  \u003c\/p\u003e\n\n  \u003c!-- SEXING --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    Male vs. Female CW217 Rio Tomo Cory\n  \u003c\/h2\u003e\n\n  \u003cp\u003e\n    Adult CW217 can show useful differences between males and females.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    \u003cstrong\u003eMales\u003c\/strong\u003e generally remain smaller and slimmer, reaching\n    approximately \u003cstrong\u003e2.25 inches\u003c\/strong\u003e. Mature males may develop\n    noticeably elongated dorsal fins and have longer, more pointed pelvic fins.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    \u003cstrong\u003eFemales\u003c\/strong\u003e can approach approximately\n    \u003cstrong\u003e2.75 inches\u003c\/strong\u003e and typically become broader and heavier\n    through the body. Their pelvic fins are generally shorter and more rounded.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Dorsal-fin length alone should not be used to determine sex because\n    individual variation occurs.\n  \u003c\/p\u003e\n\n  \u003c!-- WHY CW217 --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    Why Choose CW217 Rio Tomo Concolor Cory?\n  \u003c\/h2\u003e\n\n  \u003cul style=\"padding-left: 22px;\"\u003e\n    \u003cli\u003e\u003cstrong\u003eNew and highly collectible CW-number Cory\u003c\/strong\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003cstrong\u003eDistinctive two-tone metallic coloration\u003c\/strong\u003e\u003c\/li\u003e\n    \u003cli\u003eClosely related in appearance to the Slate Cory\u003c\/li\u003e\n    \u003cli\u003eUnique Rio Tomo \/ Caño Negro locality\u003c\/li\u003e\n    \u003cli\u003ePeaceful temperament for community aquariums\u003c\/li\u003e\n    \u003cli\u003eActive and entertaining bottom-foraging behavior\u003c\/li\u003e\n    \u003cli\u003ePotential extended dorsal fin in mature adults\u003c\/li\u003e\n    \u003cli\u003eSocial behavior when maintained in a proper group\u003c\/li\u003e\n    \u003cli\u003eExcellent specialty fish for serious Cory enthusiasts\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003c!-- IMPORTANT BEFORE BUYING --\u003e\n  \u003cdiv style=\"background: #f5faf8; border: 1px solid #d8e8e2; padding: 20px; margin: 30px 0; border-radius: 5px;\"\u003e\n    \u003ch2 style=\"color: #016141; font-size: 21px; margin: 0 0 10px 0;\"\u003e\n      Before Buying CW217 Rio Tomo Concolor Cory\n    \u003c\/h2\u003e\n\n    \u003cp style=\"margin: 0;\"\u003e\n      CW217 is a newly introduced and still undescribed collector Cory.\n      Keep \u003cstrong\u003eat least 6 fish\u003c\/strong\u003e, with larger groups preferred,\n      and introduce them only to a mature, fully cycled aquarium.\n      Provide fine sand, excellent water quality, good oxygenation,\n      peaceful tank mates, and a varied diet. Because this is a\n      CW-number locality fish, maintaining accurate identification and\n      avoiding unnecessary mixing with similar concolor-type Corys is\n      especially valuable for future breeding efforts.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- FAQ --\u003e\n  \u003ch2 style=\"color: #016141; font-size: 24px; margin-top: 34px;\"\u003e\n    CW217 Rio Tomo Concolor Cory FAQ\n  \u003c\/h2\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      What is a CW217 Rio Tomo Concolor Cory Catfish?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      CW217 is a recently introduced, undescribed Cory-type catfish from\n      a tributary of the Rio Tomo in eastern Colombia. It closely resembles\n      \u003cem\u003eHoplisoma concolor\u003c\/em\u003e but displays a more contrasting two-tone\n      coloration and is currently identified as \u003cem\u003eHoplisoma sp. CW217\u003c\/em\u003e.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      What does CW217 mean?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      CW217 is the Corydoras World identification number assigned to this\n      undescribed fish. The CW number allows aquarists and breeders to\n      identify the population consistently before it receives a formal\n      scientific species name.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      Is CW217 the same as Hoplisoma concolor?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      Not currently. CW217 is clearly closely related to\n      \u003cem\u003eHoplisoma concolor\u003c\/em\u003e, but it remains an undescribed and\n      geographically distinct Rio Tomo form. Until formal taxonomic work\n      determines its exact status, it is better identified as\n      \u003cem\u003eHoplisoma sp. CW217\u003c\/em\u003e rather than simply \u003cem\u003eH. concolor\u003c\/em\u003e.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      Why is CW217 called the Rio Tomo Concolor Cory?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      The name refers to both its collection locality near the Rio Tomo\n      and its strong physical resemblance to the Slate Cory,\n      \u003cem\u003eHoplisoma concolor\u003c\/em\u003e.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      Why is CW217 called the Two-Tone Concolor Cory?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      CW217 can display cooler metallic slate, gray, or olive coloration\n      toward the front of the body with warmer rust, bronze, orange, or\n      reddish tones toward the rear, creating a distinctive two-tone appearance.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      How big do CW217 Rio Tomo Corys get?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      Specialist records give approximately \u003cstrong\u003e2.25 inches for males\u003c\/strong\u003e\n      and up to around \u003cstrong\u003e2.75 inches for females\u003c\/strong\u003e.\n      Adult females are typically broader and heavier-bodied.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      How many CW217 Corys should be kept together?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      Keep at least \u003cstrong\u003e6 CW217 Corys\u003c\/strong\u003e together.\n      Groups of \u003cstrong\u003e8 or more\u003c\/strong\u003e are preferred when aquarium\n      size and availability allow.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      What temperature is best for CW217 Rio Tomo Corys?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      Current specialist aquarium records recommend approximately\n      \u003cstrong\u003e71–77°F (22–25°C)\u003c\/strong\u003e, with a pH around\n      \u003cstrong\u003e6.0–7.5\u003c\/strong\u003e.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      Where do CW217 Rio Tomo Corys come from?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      CW217 comes from \u003cstrong\u003eCaño Negro, a small tributary of the\n      Rio Tomo in eastern Colombia\u003c\/strong\u003e. The Rio Tomo belongs to\n      the Orinoco drainage.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      Is the CW217 Rio Tomo Cory rare?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      Yes, CW217 is currently uncommon in the aquarium trade and remains\n      a specialty collector fish. Known imports have been relatively limited.\n      This use of “rare” refers to aquarium availability rather than an\n      official conservation classification.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      Can male CW217 Corys develop long dorsal fins?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      Yes. Mature males frequently develop elongated dorsal fins and longer,\n      more pointed pelvic fins. However, not every fish with a shorter dorsal\n      fin is necessarily female, so body shape and pelvic-fin structure should\n      also be considered.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      Are CW217 Rio Tomo Cory Catfish peaceful?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      Yes. CW217 is a peaceful social Cory and can work well in freshwater\n      community aquariums containing other calm, non-aggressive species\n      with compatible water requirements.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      What do CW217 Rio Tomo Cory Catfish eat?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      Feed a varied diet containing quality sinking pellets or tablets\n      supplemented with frozen or live foods such as bloodworms,\n      blackworms, brine shrimp, daphnia, and Tubifex.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border-bottom: 1px solid #ddd; padding: 13px 0;\"\u003e\n    \u003csummary style=\"cursor: pointer; font-weight: 700; color: #016141;\"\u003e\n      Do CW217 Corys clean the aquarium?\n    \u003c\/summary\u003e\n    \u003cp style=\"margin: 10px 0 5px 0;\"\u003e\n      CW217 naturally forage along the aquarium floor, but they should not\n      be considered aquarium maintenance animals. They require intentional\n      feeding with nutritious foods along with regular water changes and\n      normal substrate cleaning.\n    \u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- FINAL --\u003e\n  \u003cdiv style=\"margin-top: 34px; padding: 22px; background: #016141; color: #fff; border-radius: 5px;\"\u003e\n    \u003ch2 style=\"color: #fff; font-size: 23px; margin: 0 0 10px 0;\"\u003e\n      CW217 Rio Tomo Concolor Cory Catfish at Tropicflow Aquatic\n    \u003c\/h2\u003e\n\n    \u003cp style=\"margin: 0;\"\u003e\n      Add one of the newest collector Corys in the aquarium hobby to your\n      freshwater setup with the\n      \u003cstrong\u003eCW217 Rio Tomo Concolor Cory Catfish\u003c\/strong\u003e.\n      With its distinctive two-tone coloration, robust concolor-like body,\n      peaceful personality, Rio Tomo locality, and still-undescribed status,\n      \u003cstrong\u003eHoplisoma sp. CW217\u003c\/strong\u003e is an exceptional choice for\n      serious Cory enthusiasts and carefully maintained freshwater aquariums.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n","brand":"Tropicflow","offers":[{"title":"1 Fish","offer_id":52690160615722,"sku":null,"price":14.99,"currency_code":"USD","in_stock":false},{"title":"3 Fish","offer_id":52690160648490,"sku":null,"price":49.99,"currency_code":"USD","in_stock":false},{"title":"6 Fish – Recommended","offer_id":52690160681258,"sku":null,"price":99.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/6237\/5466\/files\/CW217-Rio-Tomo-Concolor-Corydoras-Catfish-2.jpg?v=1789894150","url":"https:\/\/tropicflow.com\/products\/cw217-rio-tomo-concolor-cory-catfish-hoplisoma-sp-cw217","provider":"Tropicflow","version":"1.0","type":"link"}