Plec catfish

Adults can reach 40 cm in length, although their size tends to be somewhat smaller in aquarium conditions. The body of these fish is elongated, flattened from above, and gradually tapers towards the caudal fin. The high dorsal fin has a translucent structure. The coloration is quite diverse and depends on the region of origin, varying from pinkish-blue to yellowish-brown hues. A distinctive feature of their appearance is the numerous black spots scattered all over the body. Sexual dimorphism in the species is weakly expressed, and noticeable differences between males and females are usually not observed.

These fish are widespread in the Amazon basin, covering the territories of modern Brazil, Ecuador, Peru, and Bolivia. They prefer flowing waters rich in dissolved oxygen, with a sandy-stony substrate.

This species is distinguished by an amazingly peaceful and calm disposition, which makes it perfectly compatible with fish of similar size. Since Aphanotorulus emarginatus is not a territorial fish, it can be kept in groups of conspecifics, but this would require a very large aquarium. Due to its size, this catfish is not suitable for cohabitation with small fish, which may be frightened or accidentally eaten. Catfish are not picky eaters and, given the opportunity, can snack on smaller fish.

For such a large fish, a spacious aquarium is necessary; for a single catfish, a tank of at least 250 liters is required. The aquarium decor can be arbitrary, the main thing is to provide a sufficient number of shelters of appropriate size. It is recommended to use large plants with a well-developed root system, as well as several smooth boulders. Lighting should preferably be subdued, as the Pleco catfish feels most comfortable in shaded conditions. The choice of equipment should be based on the need to maintain a high level of dissolved oxygen (aeration), effectively remove waste products (filtration), and ensure optimal water hydrochemical composition.

Regarding diet, these catfish are completely unpretentious and readily accept most popular sinking foods for aquarium fish. Additional plant components can also be included in their diet, such as peeled cucumbers, zucchini, or spinach.

Breeding is not documented. The species belongs to the cave spawners: the eggs are laid in a shelter, and the male guards and ventilates the clutch. No reliable way to sex the fish or trigger spawning has been described for this species, and it reaches the trade as wild-caught stock.

The main cause of most diseases in these 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.

When purchasing, caution should be exercised, as this species often goes on sale at a young age, reaching significant sizes as adults. Carefully inspect the fish for signs of emaciation: sunken belly and recessed eyes are critical indicators of poor health. A healthy individual should have a rounded abdomen, be active, and show no visible damage to the skin or fins.