Flagtail Corydoras Care Guide
Corydoras robineae · Freshwater Fish

What Flagtail Corydoras look like
Corydoras robineae, commonly known as the Flagtail Corydoras, exhibits a small, armored body that typically reaches a maximum adult size of approximately 2 to 2.5 inches (5 to 6.5 cm). The body is generally pale with subtle dark markings, providing a cryptic coloration that aids in camouflage within its natural habitat. A distinctive feature of this species is its boldly patterned caudal fin, characterized by alternating dark and light horizontal stripes that resemble a flag, hence the common name. The fish possesses a laterally compressed body shape typical of the genus Corydoras, along with a robust, bony armor composed of overlapping scutes. Notably, the species lacks significant sexual dimorphism, although females may appear slightly larger and more rounded when gravid. Defensive adaptations include the presence of pectoral spines that can be extended when threatened, serving as a deterrent against potential predators.
Behavior & temperament
Flagtail Corydoras are primarily benthic dwellers, often found foraging along the substrate in small groups. They exhibit a social hierarchy typical of Corydoras species, often forming loose schools that provide safety in numbers. This species is generally peaceful and non-aggressive, making it suitable for community tanks. Breeding behavior involves egg scattering, where females lay adhesive eggs on surfaces such as plants or substrate, which are then fertilized by males. The Flagtail Corydoras is known for its inquisitive nature, often exploring its environment and interacting with tank mates, but it does not exhibit territorial aggression.
Diet & feeding
In the wild, Flagtail Corydoras are omnivorous, feeding on a varied diet that includes detritus, small invertebrates, and plant matter. In captivity, they thrive on a balanced diet of high-quality sinking pellets, supplemented with occasional live or frozen foods such as bloodworms and brine shrimp to ensure optimal health and coloration.
Behind the name
Corydoras (from Greek 'korydallos', meaning 'helmeted'; referring to the armored nature of the fish) robineae (named in honor of a person, likely a researcher or contributor to the field).
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Flagtail Corydoras?
AquaLens identifies your fish and plants from a photo, tracks water chemistry, and flags health issues early — free on iOS and Android.



