Red Sailfin Cory Catfish Care Guide - Aquarium Setup, Diet & Breeding

Red Sailfin Cory Catfish are large, high-backed members of the corydoras group, recognised by their robust body, pale bronze to brown colouring and darker markings across the head and flanks. Their tall dorsal fin gives them a distinctive sail-like profile, while the reddish tones that can appear on the fins and upper body explain their common name. Like other corys, they possess rows of protective bony plates and small barbels around the mouth.

These peaceful bottom dwellers spend much of their time exploring the substrate, searching for food with their sensitive barbels. They are active but generally gentle, and they often rest together among plants or décor before suddenly swimming to the surface to gulp air. This behaviour is normal for the genus, which can absorb atmospheric oxygen through a modified intestine.

In nature, Red Sailfin Cory Catfish are associated with warm, soft Amazonian waters shaded by overhanging vegetation. Their broad body and strong fins are well suited to working through fine sediments and leaf litter, where small invertebrates and other edible particles collect.

Despite their size, they retain the sociable nature expected of cory catfish and are most engaging when kept in a proper group. They are a striking choice for aquarists who want a peaceful, substantial bottom-dwelling shoal rather than a tiny schooling species.

Red Sailfin Cory Catfish are native to the western Amazon basin in South America, with records from tributaries in Ecuador and Peru. They inhabit slow-moving forest streams, shallow margins and quiet backwaters with soft, sandy or muddy bottoms and abundant leaf litter.

A group should have at least a 120-litre aquarium, with a footprint of roughly 90 × 40 cm or larger to provide adequate floor space for this relatively large cory. Use smooth fine sand or rounded, smooth gravel so their delicate barbels are not damaged, and include broad-leaved plants, driftwood, caves and shaded resting areas while leaving open substrate for foraging. Gentle to moderate filtration, good oxygenation and regular maintenance are important, and a secure lid is sensible because cory catfish can occasionally leap when surfacing.

Up to about 8 cm (3.1 inches) in total length. Females are usually slightly longer and noticeably fuller-bodied than males, particularly when carrying eggs.

Offer a varied omnivorous diet built around sinking catfish pellets or wafers, supplemented with frozen or live bloodworm, brine shrimp, daphnia and other small aquatic invertebrates. Blanched vegetables can be offered occasionally, although animal-based foods are particularly useful for conditioning adults and supporting growth. Feed after other fish have settled so that food reaches the substrate, and do not rely on leftover food as their main diet.

Red Sailfin Cory Catfish are peaceful community fish and can be housed with similarly calm tetras, rasboras, danios, peaceful barbs, livebearers, dwarf cichlids and other non-aggressive catfish or loaches. Suitable tankmates should tolerate comparable warm, clean-water conditions and should not compete aggressively for food on the bottom. Avoid large predatory fish, fin-nippers and boisterous species that may harass them, as well as aggressive territorial cichlids and fish small enough to be swallowed.

Red Sailfin Cory Catfish are egg-scattering spawners that can be conditioned with generous feeding of live or frozen foods, followed by a partial water change with slightly cooler, clean water. A female carries the eggs between her pelvic fins while a male fertilises them, after which she places them on plant leaves, aquarium glass or other smooth surfaces. Remove the adults or move the eggs to a separate hatching container, as the eggs may be eaten. The eggs generally hatch in around four to six days, and the fry can be started on newly hatched brine shrimp and other suitably tiny foods.

Females are generally larger, broader and more rounded through the abdomen, while males tend to be smaller and slimmer. Mature males may also appear more streamlined when viewed from above, but colour differences are usually subtle.