Plated Cory

Adults of this species reach 10–12 cm. Their coloration is a picturesque combination of black and yellow, forming an intricate mottled pattern. A yellow stripe runs from the head to the dorsal fin. The intensity and prevalence of one color over another can vary depending on the specific region of origin. The pattern also continues onto the fins and tail, while the belly remains light. Sexual dimorphism is not pronounced; females are distinguished by more rounded body shapes, which become especially noticeable during the breeding period.

The natural habitat of this species is limited to Southeastern Brazil, extending between Rio de Janeiro and Santa Catarina. Here, the catfish inhabits coastal lakes and river deltas flowing into the Atlantic Ocean, occurring exclusively in freshwater biotopes.

Members of this species coexist well with other calm and peaceful fish. As for intraspecific relationships, competition is observed among males. In conditions of insufficient space, this can lead to skirmishes, although they very rarely result in injuries.

For a small group of these fish, the optimal aquarium volume starts from 200 liters. It is important to use a soft substrate — sand or fine gravel — in the setup. Other decorative elements, such as snags, roots, and tree branches (both artificial and natural), are not crucial and can be chosen according to the needs of other aquarium inhabitants. However, if more than one male is kept in the aquarium, sufficient hiding places should be provided. Special attention must be paid to maintaining cleanliness: not only an efficient filtration system but also regular cleaning of the substrate from organic waste, as well as weekly water changes of 15–20% of the volume with fresh water, contribute to maintaining high water quality.

The Bearded Cory is completely undemanding in terms of diet. It readily accepts most popular sinking dry foods, such as granules, flakes, and tablets, and also gladly consumes live and frozen foods.

Breeding in a community tank is quite difficult. There is a high probability that the eggs will be eaten by other inhabitants. In addition, changes in water conditions, which may be undesirable for other fish, serve as a trigger for spawning. The breeding period falls during the winter months, which in the Southern Hemisphere coincides with the beginning of the rainy season. If you plan to breed them, it is recommended to transfer the catfish to a separate tank of about 40 liters by early December, filling it with water from the main aquarium. Sandy substrate and dense plantings of plants such as Java moss or artificial spawning mops are suitable for decoration. Equipment should include an air-driven filter with a “matured” sponge media, a heater, and lighting. Success will be more likely if there are at least two females per male. The diet should include live or frozen foods. A few weeks after transfer, begin daily water changes with fresh water, gradually lowering its temperature by a couple of degrees, bringing it down to 16–18°C, with a pH of 7.0 and hardness not exceeding 8 dH. The heater should be turned off during this time. The eggs are laid either on plants or attached to the glass. After spawning, the adults are returned to the community tank; acclimatization may be necessary if water parameters differ significantly. Fry hatch after 3–4 days, and after another couple of days, they begin to swim independently in search of food. They can be fed specialized micro-food for aquarium fish fry, Artemia nauplii, or infusoria – as preferred.

The main cause of most diseases in Leaf Fish is unsuitable keeping conditions and poor-quality nutrition. If initial symptoms are observed, it is first necessary to check water parameters and the concentration of dangerous substances such as ammonia, nitrites, and nitrates. If the indicators deviate from the norm, they should be brought back into order, and only then should treatment begin. More detailed information on symptoms and treatment methods can be found in the "Aquarium Fish Diseases" section.

When selecting individuals, attention should be paid to the fish's activity and the condition of its integument. A healthy Corydoras should be swimming in the water column or exploring the substrate, showing no signs of apathy or refusal to eat. It is important to inspect the fins for integrity and the absence of white film or redness, and also to rule out the presence of visible ulcers and damage on the body. Avoid purchasing fish with sunken bellies, which may indicate emaciation or internal parasitic diseases. Given the territoriality of the species, it is advisable to acquire juveniles or a formed group, paying attention to the absence of signs of fights between individuals in the grow-out tank.