Loreto Cory Care Guide - Aquarium Setup, Diet & Breeding

Corydoras loretoensis is a small, peaceful armoured catfish from the western Amazon. Its body is covered by overlapping bony plates, and the species has the familiar whisker-like barbels around the mouth that help it investigate the bottom for food. A subtle pattern of dark markings contrasts with its silvery to golden-brown body, giving this understated cory a great deal of character when viewed closely.

The Loreto Cory is native to the Loreto region of northeastern Peru in the western Amazon Basin, where it occurs in tributaries and connected waterways around the Río Nanay and nearby Amazonian drainage systems. It comes from warm, slow-moving to gently flowing freshwater habitats with sandy areas, leaf litter and submerged vegetation.

A group of Loreto Corys should have at least a 75-litre aquarium, preferably measuring around 90 cm long by 30 cm deep or larger, so they have generous floor space for foraging. Use soft sand or very smooth fine gravel to protect their sensitive barbels, with driftwood, rounded stones, leaf litter and sturdy plants arranged to provide cover while leaving open areas for feeding. Gentle to moderate filtration, good oxygenation and clean, stable water are important, while a secure lid is advisable because Corydoras can occasionally dart to the surface.

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

These omnivorous bottom feeders eat small aquatic invertebrates, insect larvae, worms, crustaceans and plant or organic material in nature. In aquariums, offer sinking catfish pellets or tablets alongside frozen or live foods such as bloodworm, daphnia, brine shrimp and blackworms. Feed sinking foods after the tank lights have dimmed when necessary, and make sure every fish receives a share rather than relying on leftover flakes.

Loreto Corys are peaceful community fish and suit calm tankmates such as small tetras, pencilfish, rasboras, peaceful dwarf cichlids, small livebearers and other non-aggressive Corydoras. They can also be kept with small freshwater shrimp, although newly hatched shrimplets may be eaten. Avoid large or boisterous fish, fin-nippers, aggressive cichlids and species that compete aggressively for bottom space.

Loreto Corys are egg-scattering spawners that can breed in a mature, well-conditioned aquarium. Condition a group with plenty of nutritious foods, then encourage spawning with a partial water change using slightly cooler, clean water. The female carries a few adhesive eggs between her pelvic fins before placing them on aquarium glass, plant leaves or other smooth surfaces, while the male fertilises them. Adults may eat the eggs, so move the eggs or provide a separate spawning tank; hatching generally occurs after several days, and the tiny fry can be raised on infusoria or finely powdered foods before progressing to newly hatched brine shrimp.

Females are generally broader-bodied and slightly longer than males, especially when viewed from above. Males tend to be slimmer, with a more streamlined profile; the difference is most noticeable when the fish are mature and females are carrying eggs.