Adolfo's Corydoras

Adults of this species grow to approximately 6 cm. Their body and fins are predominantly light-colored. A black back, adorned with a bright red spot at the base of the dorsal fin, serves as a characteristic distinguishing feature of the species. A noticeable black stripe, running through the eyes across the head, resembles a kind of mask. Sexual dimorphism in Adolfo's Corydoras is not clearly pronounced, making sex determination difficult.

Adolfo's Corydoras inhabits water bodies in the Rio Negro and Uaupés river basins in Brazil. Its natural environment consists of areas with slow currents, where the water is rich in tannins due to abundant organic matter, giving it a characteristic tea-like hue. In these locations, the water is characterized by high acidity (pH 4.0–5.5) and very low hardness.

This is a peaceful, schooling fish, primarily active in the bottom layer of the water. For their comfort, it is recommended to keep a group of 5–6 individuals. Adolfo's Corydoras get along well with other calm fish species that prefer similar water parameters and do not show aggression towards tank mates.

A minimum aquarium volume of 60–70 liters is required for keeping them. Soft river sand must be used as substrate, as sharp gravel particles can damage the fish's delicate barbels. The decor should include driftwood and live plants to create shaded areas. Gentle filtration and regular partial water changes are recommended, as the species is sensitive to the accumulation of organic pollutants.

In nature, they feed on small invertebrates, worms, and plant detritus. In the aquarium, fish readily accept high-quality sinking foods: specialized granules or tablets for bottom-dwelling fish. It is beneficial to diversify the diet with frozen or live foods such as Artemia, Daphnia, or bloodworms. Feeding should be done 1–2 times a day, ensuring that food remains do not spoil the water.

Breeding occurs in a spawning tank, stimulated by frequent changes of soft water. The female lays small portions of eggs (1–2 at a time) on plant leaves or glass, sticking them on. Parents do not show care for their offspring. The incubation period is about 3–5 days, after which the larvae begin to feed independently. Rearing fry requires clean water and the use of infusoria or Artemia nauplii.

The species is susceptible to typical Corydoras diseases, mainly arising from poor water quality or unsuitable substrate. Bacterial infections are possible if barbels are damaged by rough substrate. They are sensitive to abrupt changes in environmental parameters and the accumulation of nitrogenous compounds. Prevention involves regular siphoning of the sand and maintaining a stable biological balance.

When purchasing, choose active fish with clean fins and no white spots or sores on their bodies. It is important to ensure that the catfish have intact barbels, as their absence indicates improper keeping conditions in the store. Healthy individuals should show interest in foraging on the bottom and not appear emaciated.