Corydoras tukano

Although the catfish had been known to science since the 1960s, it was long confused with Corydoras reynoldsi. This was due to a similar body pattern and shared habitat region. Only in 2003 was Corydoras tukano recognized as an independent species. Adults grow up to 4 cm in length. A distinctive feature is their robust, stocky body, protected by rows of bony plates. The first rays of their fins are modified into sharp spines. Their coloration is light, complemented by three black vertical stripes, arranged sequentially: on the head, below the dorsal fin, and at the base of the tail.

These catfish originate from South America. Their natural habitat is the shallow areas of tributaries in the upper Rio Negro basin, within the Brazilian state of Amazonas, where they prefer calm currents.

These fish are distinguished by their peaceful and calm nature; they enjoy being in a group of their own kind. They coexist well with many other aquarium inhabitants, provided they are comparable in size and temperament.

For a group of 3–4 fish, the optimal aquarium volume is 40–50 liters. The decor can be simple. It is important to have shelters in the aquarium, which can be created from natural driftwood, aquatic plants, or other elements of natural or artificial decor. This species of Corydoras is considered unpretentious and easy to care for. Corydoras tukano can adapt to various conditions, tolerating a wide range of pH and GH values. Basic aquarium care includes regular (weekly) partial water changes, timely removal of organic waste, and maintaining equipment in working order. They are not finicky eaters. They will readily accept popular dry foods such as flakes and pellets. Live, frozen, or dry zooplankton such as bloodworms, Artemia, Daphnia, Gammarus, and other invertebrates also make an excellent choice.

Regarding feeding, these fish are unpretentious. They readily accept popular dry foods, whether flakes or pellets. Live, frozen, or dry zooplankton such as bloodworms, Artemia, Daphnia, Gammarus, and other small invertebrates will be an excellent addition to their diet.

Breeding Corydoras in aquarium conditions requires the preparation of a separate spawning tank. To stimulate the process, an active partial water change with fresh water, lowering its temperature by several degrees, is often used. Spawning is paired or group-based, with males actively pursuing females. Fertilization occurs when the female takes the male's milt into her mouth. Eggs are laid on hard substrates, including aquarium glass or plant leaves. After spawning is complete, the parents should be removed to prevent them from eating the eggs. Larvae appear after a few days, and after the yolk sac is absorbed, the fry are fed with Artemia nauplii or specialized micro-foods.

The species is susceptible to diseases typical of armored catfish, often caused by poor keeping conditions. Common symptoms include fin rot or cloudiness, the appearance of white spots on the body, cotton-like growths indicating fungal infections, and exophthalmia. Prevention includes maintaining a clean substrate, regular water changes, and ensuring quality filtration. Fish are sensitive to the accumulation of organic waste and sudden changes in water parameters. If signs of illness are detected, it is recommended to check water quality and, if necessary, use antiseptic agents for aquariums.

When purchasing, choose active fish with clean skin without visible ulcers, spots, or fin damage. Healthy individuals should show interest in foraging for food in the substrate and not exhibit signs of emaciation or a bloated abdomen. Avoid buying fish from tanks where there are deceased specimens or individuals with signs of disease. In the store, it is important to pay attention to their behavior: healthy Corydoras stay in a school, do not show apathy, and do not have rapid breathing, which can indicate stress or poor water quality in the system.