Napo Cory Care Guide - Aquarium Setup, Diet & Breeding

The Napo Cory is a small, attractively marked armoured catfish with a pale silver to cream body, a dark lateral stripe and contrasting darker markings across the head and back. Its rounded body and delicate barbels give it the familiar, endearing appearance associated with Corydoras, while its patterning helps distinguish it from many close relatives.

This is a peaceful, active bottom-dweller that spends much of the day exploring the substrate with its sensitive barbels. Napo Corys often forage together, resting briefly before suddenly darting around the aquarium in search of edible morsels. They are most confident and expressive when kept in a proper group of their own kind.

In nature, the species lives in warm Amazonian waters influenced by seasonal rainfall and changes in river level. Leaf litter, submerged roots and broken patches of vegetation provide shelter and create rich feeding grounds where small aquatic invertebrates and organic material collect.

Like other Corydoras, Napo Corys are not scaleless fish: their bodies are protected by overlapping bony plates. They can also gulp atmospheric air at the surface and absorb oxygen through the hindgut, a natural adaptation that helps them cope with periodically oxygen-poor habitats.

Napo Corys originate from the upper Amazon basin, particularly the Río Napo and connected waters in eastern Ecuador and northern Peru, South America. They inhabit shallow, slow-moving tributaries, flooded forest margins and sandy or fine-pebbled stream areas.

A group of Napo Corys should be given at least 75 litres, with a footprint of roughly 60 by 30 cm or larger so they have uninterrupted space to forage. Use soft fine sand or smooth, rounded gravel that will not abrade their barbels, along with driftwood, smooth stones, leaf litter and sturdy plants to create cover. Leave open areas for feeding, provide gentle but effective filtration and maintain good oxygenation without producing an overpowering current.

Up to about 5 cm (2 in) in total length. Females are generally larger and fuller-bodied, reaching around 5 cm, while males commonly remain closer to 4–4.5 cm (1.6–1.8 in).

Napo Corys are omnivorous opportunistic feeders. Offer sinking catfish pellets or wafers as a staple, supplemented with frozen or live foods such as bloodworm, daphnia, brine shrimp and blackworm. They also benefit from occasional soft vegetables and should receive enough food to ensure that every fish can feed, rather than relying on leftovers from midwater tankmates.

Napo Corys are gentle community fish and suit peaceful tankmates such as small tetras, pencilfish, rasboras, peaceful dwarf cichlids, honey gouramis, small livebearers and other non-aggressive Corydoras. They should not be housed with large, boisterous or predatory fish, fin-nippers, aggressive cichlids or species that compete aggressively for the bottom. Tankmates must also be small enough not to swallow them or injure their barbels.

Napo Corys are egg-scattering breeders that can be conditioned with a varied, protein-rich diet before introducing cooler, clean, well-oxygenated water to encourage spawning. The female carries a few adhesive eggs between her pelvic fins and places them on the aquarium glass, plant leaves or other smooth surfaces, while the male fertilises them. Remove the adults or protect the eggs from hungry tankmates; hatching usually occurs in around three to five days, and the fry can be raised on infusoria or powdered fry food before moving on to newly hatched brine shrimp.

Females are typically broader through the body, especially when viewed from above, and are usually slightly longer than males. Males are slimmer and more streamlined, with less pronounced abdominal fullness.