Pterygoplichthys

Adult specimens can reach a length of 30 cm. Sexual dimorphism in these fish is extremely subtle, and distinguishing males from females is quite challenging. A distinctive feature is their large head and noticeably flattened upper body. Their large fins and tail are particularly striking, and their coloration is most often spotted, in shades of gray.

This species originates from the waters of South America. Its natural habitat includes the Madeira and Purus river basins, which are right tributaries of the mighty Amazon and flow predominantly through Brazil. Individuals are also found in the Marañón River, located in Peru. These rivers are characterized by murky, silt-rich water, containing many snags and plant debris accumulated after annual forest floods. Additionally, many floodplain lakes are located along the banks of these rivers.

This fish has a calm and peaceful nature, allowing it to coexist well with other species of comparable size, even rather aggressive ones. However, keeping them with very small fish is undesirable, as the latter may accidentally become victims due to the catfishes' lack of selectivity in feeding. Intraspecific conflicts are not observed, and keeping several individuals is permissible if the aquarium is sufficiently large.

For comfortable keeping of a single catfish, the optimal aquarium volume should be at least 200 liters. Although Carachama is not highly mobile, it still requires ample space. When decorating the aquarium, it is recommended to use various shelters, such as snags. Stony gravel is best suited as a substrate. Sand should be avoided, as the fish's movements can stir up significant particulate matter that could damage filters. Live rooted plants should also be replaced with artificial ones, as they can be uprooted or eaten. However, floating plants are less susceptible to such risks. Creating favorable conditions requires maintaining stable water parameters and appropriate hydrochemical indicators. Important aspects of aquarium care include weekly partial water changes with fresh water and regular removal of organic waste.

Carachama is an omnivorous species, so its diet should be balanced and include both plant-based and protein components. Suitable plant foods include peas, as well as pieces of zucchini, cucumbers, and spinach. Bloodworms and Artemia are suitable protein foods. Additionally, dry balanced foods, preferably sinking ones, can be used.

Breeding Carachama in a home aquarium presents significant difficulties, mainly due to the large size of adult specimens. The challenge also lies in replicating the specific natural conditions associated with the change of dry and wet seasons. Currently, these fish are bred predominantly on specialized commercial farms.

Pterygoplichthys, like many other catfishes, is known for its hardiness and unpretentiousness. Diseases in these fish are quite rare and are usually associated with inappropriate keeping conditions.

When choosing a Pterygoplichthys, it is important to assess the fish's overall condition: the body should be clean, without white spots, ulcers, bruises, or skin lesions. A healthy specimen in the store will be active, firmly clinging to the glass or decor elements, rather than lying sluggishly on the bottom. Avoid specimens with sunken bellies, which may indicate emaciation or internal parasites, as well as fish with unnaturally bloated bellies. Keep in mind that Pterygoplichthys are territorial fish, so it's worth observing their behavior in the general tank at the store. Aggressive or timid individuals may be a sign of stress or overcrowding. It is optimal to acquire young specimens, as they adapt more easily to new conditions, but remember that this species reaches impressive sizes and will require a very spacious aquarium in the future.