Black-and-white Corydoras

As noted earlier, this species is very similar to some other Corydoras catfish that have a similar pattern of dark speckles on a light, silvery background. Adults reach a length of 4 to 5 cm. A distinctive feature is a black stripe running through the head and eyes, as well as noticeable black pigmentation on the dorsal fin.

The species inhabits South America, primarily in the Ucayali and Marañón river basins in Peru and Colombia. In nature, it lives in shallow streams and small rivers flowing under the dense canopy of the tropical forest. The water in such biotopes is usually soft, acidic, and stained brown due to the high content of tannins released by decaying organic matter. The bottom of the water bodies is covered with a layer of fallen leaves, branches, and sand.

A peaceful, active, and schooling fish that feels comfortable only in a group. It is recommended to keep at least 4–6 individuals to reduce stress levels and observe natural behavior. The species is compatible with most non-aggressive fish of comparable size. The catfish spend most of their time near the bottom, actively exploring the substrate in search of food.

Most specimens of black-and-white Corydoras available for sale have been kept in artificial aquarium conditions for many generations. During this time, they have successfully adapted to an environment that often differs significantly from the natural habitats of their wild relatives. For their long-term and healthy keeping, it is crucial to maintain water purity, use a soft sandy substrate, and provide several shelters. Natural snags, live aquatic plants, or various decorative elements can serve as such shelters. For a small group of these fish, the optimal aquarium should have a volume of at least 80 L. Aquarium care is standard and very similar to that for many other species: weekly partial water changes, regular removal of organic debris (food, excrement), checking and maintaining equipment, and cleaning glass and decor from plaque. As for feeding, this species is omnivorous: it readily accepts most popular sinking foods of appropriate size used in aquaristics. It is desirable that their daily diet includes a variety of products, for example, a combination of dry, frozen, and live foods. In behavior, these fish are peaceful and sociable, preferring to be in the company of their kin. It is recommended to keep them in a group of at least 4–6 individuals. They get along well with other non-aggressive species of comparable size.

An omnivorous species, feeding on small invertebrates and organic detritus in nature. In the aquarium, they accept any quality sinking foods: specialized tablets for bottom fish, granules, or flakes. To maintain health, it is recommended to include live or frozen foods in their diet, such as bloodworms or Artemia. Feeding should be done in the evening or just before turning off the lights, as the catfish show increased activity at dusk.

Breeding is possible in aquarium conditions. Spawning is stimulated by frequent water changes with cooler water, mimicking the rainy season. The female lays eggs on plant leaves, glass, or decor elements. After spawning, it is recommended to remove the parents. Fry hatch after 3–4 days and, after becoming free-swimming, require fine starter food such as infusoria or micro-worms, with a subsequent transition to Artemia nauplii.

The fish are sensitive to water quality and substrate cleanliness. When kept on coarse or sharp substrate, damage to their delicate barbels is possible, leading to bacterial infections. The species is extremely sensitive to salt content in the water. Prevention includes weekly partial water changes, gravel vacuuming, and maintaining stable environmental parameters.

When purchasing, choose active individuals with clean skin and undamaged fins. It is important to pay attention to the condition of the barbels: they should be intact, without signs of erosion or inflammation. Avoid specimens with sunken bellies or signs of apathy, as this may indicate health problems or improper keeping conditions in the store.