Longfin Green Cory Catfish (Corydoras aeneus – longfin variant) are peaceful, hardy bottom-dwellers ideal for community aquariums, thriving best in groups of 6 or more where their natural schooling behavior and confidence shine. They prefer a well-established tank with soft sand or smooth substrate to protect their sensitive barbels, plenty of plants, driftwood, and shaded areas, and excellent water quality with gentle flow. Longfin Green Corys are active during the day, constantly foraging along the bottom, and should be fed a varied diet of high-quality sinking pellets or wafers supplemented with frozen or live foods like bloodworms, brine shrimp, and daphnia. Stable parameters, regular water changes, and avoiding sharp decor are essential, as their long fins are more delicate than standard Corys and can be prone to damage in poor conditions or with aggressive tankmates.
Care Aspect
Recommended Conditions
Scientific Name
Corydoras aeneus (Longfin Green)
Common Name
Longfin Green Cory Catfish
Adult Size
2.5–3 inches (6–7.5 cm)
Tank Size
20 gallons minimum (larger for groups)
Social Needs
Peaceful, schooling; keep 6+
Temperature
72–78°F (22–26°C)
pH Range
6.0–7.5
Hardness
Soft to moderately hard (2–12 dGH)
Substrate
Fine sand or smooth rounded gravel
Diet
Sinking pellets, wafers, frozen/live foods
Temperament
Very peaceful, community safe
Activity Level
Active bottom forager
Lifespan
5–10 years with proper care
Special Notes
Long fins are delicate; avoid sharp décor and fin-nipping tankmates