Fuller's Cory Care Guide - Aquarium Setup, Diet & Breeding

Fuller's Cory is a small armoured catfish with the familiar whisker-like barbels, downward-facing mouth and rows of protective bony plates along its body. Its pattern is made up of soft brown, grey and cream tones, usually with darker markings across the head and body that help it blend into leaf litter and shaded streambeds.

This species is peaceful, active and sociable. Rather than remaining hidden all day, a group will regularly explore the bottom, sift through the substrate and rest together beneath cover. They are capable of taking air at the surface, a natural behaviour shared by many Corydoras, and should not be mistaken for a sign of illness when it occurs occasionally.

In the wild, Fuller's Cory inhabits calm forest waterways influenced by seasonal rainfall. Fine sediment, fallen leaves, roots and submerged vegetation create a complex bottom environment where the fish can search for small invertebrates and other edible material.

Like other Corydoras, it is not a conventional algae-eater or waste-cleaning substitute. Its peaceful temperament and engaging group behaviour have made it an appealing choice for planted community aquariums, especially where a small, gentle bottom-dweller is wanted.

Fuller's Cory is native to the upper Amazon basin in Loreto, northern Peru, particularly the Rio Nanay drainage near Iquitos. It comes from warm, slow-moving forest streams and tributaries with soft substrates and abundant submerged cover.

A group of Fuller's Corys should have at least 60 litres, with a footprint of approximately 60 x 30 cm or larger. Use soft sand or very smooth fine gravel so their sensitive barbels are not damaged while they forage. Include driftwood, rounded stones, broad-leaved plants, shaded areas and open substrate for searching, while maintaining gentle filtration and good oxygenation. A secure lid is useful because Corydoras can occasionally leap when startled.

Females reach about 5 cm (2 inches) in length, while males are usually smaller at around 4–4.5 cm (1.6–1.8 inches).

Feed a varied diet of sinking catfish pellets, high-quality tablets and small granules, supplemented with frozen or live foods such as bloodworm, daphnia, mosquito larvae and brine shrimp. Their barbels help them locate food, but they still need deliberate feeding rather than relying on scraps left by other fish. Offer food after the aquarium lights dim if faster midwater fish routinely consume it first.

Fuller's Corys are well suited to peaceful community aquariums with small tetras, rasboras, pencilfish, peaceful livebearers, honey gouramis and other non-aggressive dwarf fish. They can also be kept with other similarly sized, peaceful Corydoras when the aquarium has enough floor space. Avoid large or boisterous fish, fin-nippers, aggressive cichlids and predatory species, as these small catfish can be easily stressed, injured or outcompeted for food.

Fuller's Corys are egg-scattering spawners and can be conditioned with a varied, protein-rich diet before breeding. A large water change with slightly cooler, clean water often encourages spawning. The female carries a few adhesive eggs between her pelvic fins before placing them on aquarium glass, plants or other smooth surfaces, while the male fertilises them. Remove the adults or transfer the eggs to a separate hatching container, as the eggs may be eaten. Hatching generally takes several days, after which the fry can be fed newly hatched brine shrimp or other appropriately small foods.

Females are generally longer-bodied and noticeably broader, especially when carrying eggs. Males are slimmer and slightly smaller, with a more streamlined profile when viewed from above.