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

Sand's Cory is a small, peaceful armoured catfish with the familiar rounded body, underslung mouth and sensitive barbels characteristic of Corydoras. Its body is patterned in subdued silver, grey and dark markings, providing camouflage over a sandy riverbed, while its dark eyes and active foraging style give it considerable character.

This species spends much of its time close to the bottom, nosing through the substrate with its barbels in search of food. It is not a solitary predator: Sand's Cory is a social fish that communicates and explores in groups, often resting together before suddenly becoming active and darting around the aquarium.

In the wild, it inhabits shallow, slow-moving or gently flowing waters of the Rio Negro region. The surrounding habitat may include submerged roots, fallen leaves and marginal vegetation, with the dark organic material contributing to the area's characteristic stained water.

Like other Corydoras, Sand's Cory can gulp air at the surface and absorb oxygen through its intestine. This natural adaptation is normal, although frequent frantic surface trips can indicate poor water quality or inadequate oxygenation. Its peaceful nature and engaging behaviour make it a rewarding choice for a suitably arranged community aquarium.

Sand's Cory is native to Brazil in South America, where it is associated with the Rio Negro drainage and its clear to tea-coloured tributary waters. It comes from warm, soft, typically acidic Amazonian habitats with sandy bottoms and leaf litter.

A group of Sand's Cory should have at least a 60-litre aquarium, with a footprint of roughly 60 by 30 cm or larger; floor space is more valuable than extra height. Use smooth, fine sand or another rounded substrate that will not damage the barbels, together with driftwood, roots, broad-leaved plants and shaded retreats. Leave open areas for foraging, provide gentle circulation and maintain clean, well-oxygenated water. Leaf litter can help recreate the shelter and natural food-rich conditions of its habitat.

Females can reach about 5.5 cm (2.2 in), while males are usually smaller at around 4.5–5 cm (1.8–2 in).

Sand's Cory is an omnivorous bottom-feeder that accepts sinking carnivore pellets, tablets and granules, supplemented with frozen or live foods such as bloodworm, daphnia, mosquito larvae and brine shrimp. Occasional soft vegetables can add variety, but meaty foods should form an important part of the diet. Feed after the aquarium lights dim if necessary, and make sure every fish receives food rather than assuming leftover flakes will reach the bottom.

Sand's Cory is a peaceful community fish and can be kept with small, gentle South American species such as small tetras, pencilfish, peaceful rasboras and other compatible Corydoras. It also suits calm dwarf cichlids and peaceful surface-dwelling fish when water requirements overlap. Avoid large or boisterous cichlids, aggressive species, fin-nippers and predatory fish, as well as tankmates that may compete aggressively for food. It should not be kept with fish likely to swallow it or harass its barbels.

Sand's Cory is an egg-scattering species that can be encouraged to spawn in a mature aquarium with abundant food and a sequence of cooler, fresh-water changes. Several males usually pursue one female, which holds fertilised eggs between her pelvic fins before placing them on plant leaves, aquarium glass or other smooth surfaces. The adults should be removed or the eggs protected, as Corydoras may eat them. The eggs generally hatch in around three to five days, and the fry can be raised on fine live foods and suitably small prepared foods.

Females are typically broader-bodied and slightly longer than males, especially when viewed from above. Males are slimmer and more streamlined, with the size difference becoming clearest when females are carrying eggs.