Gosse's Corydoras

These catfish reach approximately 5 cm in length. Their bodies are brown, and their bellies have a dark yellow sheen. The pattern on their bodies is formed by numerous light spots. Their fins are translucent, and brownish stripes can be seen on the caudal fin.

Gosse's Corydoras inhabits the Mamoré River basin, located on the border of Brazil (Rondônia state) and northeastern Bolivia. In nature, the fish live in shallow areas of rivers and streams with slow currents, sandy or silty bottoms, and dense aquatic vegetation. The water in these biotopes is typically soft and slightly acidic.

This is a peaceful and sociable species, showing the most activity when kept in a group. In an aquarium, it is recommended to keep a shoal of at least 4–6 individuals, as solitary keeping causes stress in the fish. Corydoras spend most of their time near the bottom, actively exploring the substrate in search of food, and get along well with any non-aggressive fish species of comparable size.

Gosse's Corydoras is an undemanding species, easy to keep. It coexists readily with other fish, has no special requirements for water parameters or diet, and successfully adapts to the conditions of most freshwater aquariums. These catfish are suitable for both beginner and experienced aquarists. For a group of 4–6 individuals, a tank volume of 80 liters or more will be optimal. Since they spend most of their time at the bottom, special attention should be paid to the lower tier when decorating the aquarium. It is recommended to use a substrate of sand or fine gravel. It is important that the substrate particles do not have sharp edges to avoid damaging the fish's sensitive barbels. It is also necessary to provide several shelters. Snags, dense plant thickets, and various decorative elements make excellent hiding places. The rest of the design depends on the aquarist's preferences. A key aspect of keeping them is maintaining stable hydrochemical water parameters within acceptable pH and dGH limits, as well as preventing the accumulation of organic waste. To achieve this, the aquarium should be equipped with an efficient filter, and regular maintenance should be performed: weekly partial water changes with fresh water, removal of food remnants, excrement, and decaying plant parts. Regarding feeding, Gosse's Corydoras is omnivorous, so it accepts most popular dry and freeze-dried foods (flakes, granules, tablets), as well as live and frozen foods such as daphnia, artemia, and bloodworms. To ensure a complete diet, it is desirable to combine different types of food. This species is known for its peaceful and friendly nature, coexisting perfectly with many other non-aggressive fish of comparable size. The catfish prefer to live in a group, so the group size should be at least 4–6 individuals.

The species is omnivorous. In the aquarium, fish readily accept high-quality sinking dry foods, specialized tablets for bottom-dwelling fish, as well as frozen or live foods such as bloodworms, daphnia, and brine shrimp. To maintain good health, it is recommended to diversify the diet and avoid feeding only on food scraps falling from the middle or upper layers.

Breeding occurs through spawning, which is often stimulated by a large water change with cooler water, mimicking the rainy season. Females lay eggs on plant leaves, decorative elements, or the aquarium glass. It is recommended to use a group with a predominance of males. After spawning is complete, the parent fish should be removed, as they may eat the eggs. Fry hatch after a few days, after which they are fed with Artemia nauplii or specialized fry foods.

Fish are sensitive to water quality and substrate cleanliness, as poor keeping conditions can damage their sensitive barbels, opening the way for bacterial infections. It is important to maintain low levels of organic waste through regular substrate vacuuming and water changes. With proper care, the species exhibits robust health and resistance to typical diseases.

When purchasing, choose active individuals with clean fins, no spots on the body, and intact barbels. Avoid fish showing signs of lethargy, skin lesions, or an unnaturally sunken abdomen. Healthy corydoras should show interest in foraging in the substrate and stay in a shoal, without displaying signs of timidity or apathy.