C020 Skunk Cory Catfish – Corydoras Granti

The C020 Skunk Cory Catfish (Corydoras granti) is one of the most recognizable Cory-type catfish in the freshwater aquarium hobby. Its light cream or tan body is crossed by a dramatic dark stripe that arches from the head along the back toward the tail, creating the appearance that inspired the popular name Skunk Cory.

Also known as Grant's Cory, Skunk Corydoras, C020 Cory, or sometimes historically sold as Corydoras arcuatus, this peaceful armored catfish combines striking coloration with classic Cory social behavior and active bottom-foraging habits.

An important identification update occurred in 2019. The fish that had been widely imported and sold for decades as Corydoras arcuatus was formally recognized as a separate species and described as Corydoras granti. The true Corydoras arcuatus is a different and considerably less common fish.

Taxonomy note: Following the modern revision of Corydoradinae, the currently accepted scientific combination is Hoplisoma granti. The aquarium trade still widely uses Corydoras granti, so both names are useful for identification and customer search intent.

C020 Skunk Cory Catfish Care Information

What Does a C020 Skunk Cory Catfish Look Like?

The C020 Skunk Cory has a pale cream, beige, tan, or light silver body contrasted by a bold dark stripe running over the top of the fish.

The stripe begins around the snout and eye area and continues along the arched dorsal profile toward the base of the tail. This black stripe against the light body creates the characteristic skunk-like pattern responsible for its common name.

Some individuals may also display subtle gray, bronze, or brown coloration beneath the primary stripe. The fins are generally clear to lightly pigmented, allowing the dramatic dorsal marking to remain the dominant visual feature.

Individual pattern intensity can vary depending on genetics, age, aquarium lighting, substrate color, stress level, and overall condition.

Why Is Corydoras Granti Called the Skunk Cory?

The common name Skunk Cory refers to the bold black stripe running lengthwise over the top of the fish against a much lighter body.

When viewed from above or from the side, this contrasting dorsal stripe resembles the characteristic black-and-white pattern associated with a skunk.

Corydoras Granti vs. Corydoras Arcuatus

For decades, the aquarium fish now known as Corydoras granti was commonly identified and sold as Corydoras arcuatus.

A detailed scientific reassessment showed that the familiar short-snouted Skunk Cory in the aquarium trade represented a different species. In 2019, it was formally described as Corydoras granti.

The true Corydoras arcuatus is a different fish and is considerably less common in the aquarium trade. Under newer taxonomy, true arcuatus is also placed in a different genus from granti.

For hobbyists, the practical takeaway is simple: most classic Skunk Corys historically labeled C020 are Corydoras granti, not true Corydoras arcuatus.

What Does C020 Mean?

The C020 designation, also commonly written C20, is part of the identification system historically used by Cory enthusiasts to distinguish aquarium forms before their scientific identity was completely resolved.

C020 became strongly associated with the familiar aquarium Skunk Cory. Scientific work later confirmed that this fish represents Corydoras granti, now classified as Hoplisoma granti.

Is Corydoras Granti Now Hoplisoma Granti?

Yes. The species was formally described in 2019 as Corydoras granti.

Following the major 2024 revision of the Corydoradinae, the species was transferred to the resurrected genus Hoplisoma. The currently accepted scientific combination is therefore Hoplisoma granti.

Because Corydoras granti remains widely recognized by aquarists and is still important for online product searches, both names are useful on an aquarium product page.

C020 Skunk Cory Behavior & Group Size

Skunk Corys are peaceful, social bottom-dwelling fish and should not be kept alone.

We recommend keeping at least 6 C020 Skunk Cory Catfish together. A proper group helps encourage more confident behavior and allows the fish to display their natural social interactions.

In a comfortable aquarium, they can often be seen moving together across the substrate, searching for food, resting beneath plants or driftwood, and exploring the lower areas of the aquarium.

Like other Cory-type catfish, Skunk Corys may occasionally make a quick trip to the water surface to gulp atmospheric air before returning to the aquarium floor. Occasional surface visits are normal Cory behavior.

Ideal Aquarium Setup for C020 Skunk Cory Catfish

A 20-gallon long aquarium or larger provides a practical starting point for a proper group of Skunk Corys. Horizontal bottom space is especially important because these fish spend much of their time exploring and foraging along the aquarium floor.

A fine sand substrate is ideal. Smooth rounded fine gravel may also be used if kept very clean, but sharp or abrasive substrate should be avoided.

Corys use sensitive barbels around their mouths while searching through substrate for food. Clean, smooth substrate helps protect these structures while allowing natural foraging behavior.

Driftwood, smooth rocks, live plants, leaf litter, and shaded areas can provide security while open sand sections give the group plenty of room to forage.

Natural-Style Aquarium for Skunk Corys

Hoplisoma granti has a broad distribution within the central and western Amazon basin and occurs in freshwater habitats across Brazil, Peru, Colombia, and Ecuador.

A natural-style aquarium can include fine sand, branchy driftwood, submerged roots, dried leaves, subdued lighting, and open areas where the Cory group can forage.

Botanical materials and leaf litter may release tannins into the water, creating a lightly tea-colored appearance similar to many forest-stream environments found within the Amazon basin.

C020 Skunk Cory Water Parameters

C020 Skunk Cory Catfish generally do well at temperatures around 72–79°F (22–26°C) with a pH of approximately 5.5–7.5.

More important than constantly adjusting water chemistry is maintaining a stable, fully cycled aquarium with clean water, appropriate filtration, good oxygenation, and regular water changes.

Ammonia and nitrite should remain at zero, and sudden changes in temperature or water chemistry should be avoided.

Good oxygenation is especially valuable for active bottom-dwelling Corys, while keeping the aquarium floor clean helps maintain healthy barbels and overall condition.

What Do C020 Skunk Cory Catfish Eat?

Skunk Corys are omnivorous bottom foragers and should receive a varied, nutritious diet specifically provided for them.

High-quality sinking pellets, tablets, or wafers can form the foundation of their aquarium diet. Supplement these foods with appropriately sized frozen or live foods such as bloodworms, brine shrimp, daphnia, Tubifex, and blackworms.

A varied diet helps support healthy growth, body condition, activity, and breeding condition.

C020 Skunk Cory Tank Mates

The peaceful temperament of the C020 Skunk Cory Catfish makes it suitable for many carefully planned freshwater community aquariums.

Potential tank mates may include peaceful tetras, rasboras, pencilfish, peaceful dwarf cichlids, small gouramis, other compatible Cory-type catfish, and other non-aggressive freshwater species with overlapping temperature and water requirements.

Avoid large predatory fish, aggressive bottom dwellers, and highly competitive species that may chase, intimidate, or prevent the Skunk Corys from receiving enough food.

Why Choose C020 Skunk Cory Catfish?

• Bold black skunk stripe from head to tail
• Classic C020 collector identification
• Beautiful cream-to-tan contrasting body color
• Peaceful temperament for community aquariums
• Manageable adult size around 2–2.5 inches
• Active and entertaining bottom-dwelling behavior
• Excellent choice for planted and natural-style aquariums
• Social behavior when maintained in a proper group
• Historically important species in Cory identification and taxonomy

C020 Skunk Cory Catfish FAQ

What is a C020 Skunk Cory Catfish?

C020 Skunk Cory is the familiar aquarium Skunk Cory now scientifically recognized as Corydoras granti, with Hoplisoma granti as its current accepted combination. It is known for its pale body and bold black stripe running along the upper profile from the head toward the tail.

What does C020 mean?

C020, often written C20, is an aquarium hobby identification number historically associated with this Skunk Cory. The fish was later formally described as Corydoras granti.

Is Corydoras granti now Hoplisoma granti?

Yes. The species was described in 2019 as Corydoras granti. Following the 2024 revision of Corydoradinae, it was transferred to the genus Hoplisoma, making Hoplisoma granti the currently accepted scientific combination.

Is C020 the same as Corydoras arcuatus?

No. For many years C020 was incorrectly identified as Corydoras arcuatus. Scientific study showed that the common aquarium C020 Skunk Cory is a separate species, which was formally described as Corydoras granti in 2019.

What is the difference between Corydoras granti and true Corydoras arcuatus?

The common aquarium Skunk Cory, Corydoras granti, is generally a shorter-snouted fish and represents the species historically labeled C020. True Corydoras arcuatus is a different and much less frequently imported species. Reliable identification should consider morphology and provenance rather than the skunk stripe alone.

Why is it called the Skunk Cory?

The name comes from the dramatic black stripe that runs from the head along the upper body toward the tail. Against the pale cream or tan body, the pattern resembles the contrasting stripe of a skunk.

How big do C020 Skunk Cory Catfish get?

Adult Skunk Corys generally reach approximately 2–2.5 inches. Mature females are usually larger and broader-bodied than males.

How many Skunk Corys should be kept together?

Keep C020 Skunk Corys in a group of at least 6 fish. They are naturally social and generally become more active and confident when maintained in a proper group.

What temperature is best for C020 Skunk Corys?

A practical aquarium temperature range for C020 Skunk Corys is around 72–79°F (22–26°C), with a pH of approximately 5.5–7.5.

Where do Corydoras granti come from?

Corydoras granti, now Hoplisoma granti, has a broad distribution within the central and western Amazon basin, including areas of Brazil, Peru, Colombia, and Ecuador.

Are C020 Skunk Cory Catfish peaceful?

Yes. Skunk Corys are peaceful social catfish and can work very well in freshwater community aquariums with other non-aggressive species that share compatible water requirements.

What do C020 Skunk Cory Catfish eat?

Skunk Corys are omnivorous bottom foragers. Feed a varied diet containing high-quality sinking pellets, tablets, or wafers supplemented with appropriately sized frozen or live foods such as bloodworms, brine shrimp, daphnia, Tubifex, and blackworms.

Do Skunk Corys clean the aquarium?

Skunk Corys naturally forage along the aquarium floor for food, but they should not be considered aquarium maintenance animals. They require intentional feeding with nutritious sinking foods along with regular water changes and normal substrate cleaning.