Four-banded Pimelodus

In their natural habitat, they can reach 35 cm in length, but in aquarium conditions, their size rarely exceeds 20 cm. Their coloration is silvery-gray with four distinct dark gray bands. With age, these bands often become less pronounced. Like most catfish, their body is somewhat flattened from above, and the triangular pectoral fins are located parallel to the belly, gliding over the substrate surface like wings when moving. A distinctive feature is their long whisker-like barbels, which help the fish find food by exploring the surrounding environment. For a long time, it was believed that the dorsal fin ray was venomous, but subsequent studies disproved this assumption, confirming its safety for humans.

These catfish are widely distributed in South and Central America, from Panama to Brazil. They can be found in the Amazon and Orinoco river systems, as well as in the Gulf of Paria and most of Guyana. The fish have adapted to living in both fresh and brackish waters, preferring areas with moderately fast currents. Living near the bottom, they feed on insects and small fish, but they also consume plant matter.

This is a peaceful schooling fish; however, it is undesirable to keep them with very small species that could become food for them. Difficulties may also arise for slow-moving fish or those with large fins: in the dark, the catfish may constantly bump into them, feeling them with their barbels. The optimal option is to keep them in a group of 5–6 individuals.

Keeping these catfish is relatively straightforward and does not require special effort. They prefer water with slight turbidity, similar to the bottom layers of the Amazon and its tributaries. Nevertheless, they adapt well to clear water, so there is no need to intentionally reduce visibility in the aquarium. It is recommended to change 10–15% of the water weekly, or 25% every two weeks. Given their size, catfish need a spacious aquarium of at least 400 L, providing ample room for swimming. It is important to provide hiding places made of driftwood or other decorative elements. Lighting should be moderate, with additional shading if floating plants are used. Smooth gravel or sand are the best substrates for these catfish, preventing damage to their barbels. Although water parameters can vary significantly, even substantial but gradual changes do not cause discomfort, which is related to the wide habitat range of wild catfish, including brackish waters. However, how prolonged exposure to hard water affects their health is not fully understood, so it is recommended to maintain optimal conditions.

The Four-banded Pimelodus is undemanding in its diet and readily consumes a variety of dry commercial foods. It is important that the food is sinking, as the fish are bottom-dwellers and will not seek food near the surface. Additionally, these catfish are typically fed at night.

These fish do not breed in artificial aquarium environments. In the wild, spawning occurs once a year during the rainy season and lasts for a short period. Scientists believe that during reproduction, the catfish migrate upstream.

No diseases have been observed under suitable keeping conditions. It is worth noting that these fish lack scales, which complicates the treatment of ichthyophthiriasis with conventional remedies. More detailed information on diseases can be found in the section "Diseases of Aquarium Fish".

When selecting specimens, attention should be paid to the integrity of their long barbels, which are often damaged during transport or when kept in unsuitable conditions. A healthy fish should be active, have clean skin without plaque, spots, or visible damage, as the absence of scales makes the species vulnerable to infections. Avoid purchasing fish with signs of emaciation or sunken bellies, as well as those that appear apathetic and constantly lie on the bottom during daylight hours without attempting to move.