False Perruno Catfish Care Guide - Size, Diet & Breeding

False Perruno Catfish are imposing pimelodid catfish with a broad, flattened head, a long body and an attractive marbled pattern of dark brown and cream or golden markings. Their large mouth and long sensory barbels reflect their predatory lifestyle, while the tall dorsal and pectoral fins give them a powerful appearance. Patterning varies between individuals and can become deeper and more contrasting as the fish matures.

This is a primarily nocturnal and crepuscular species. It often rests quietly among cover during daylight before becoming active after dark, using its barbels and sensitive lateral line to locate prey in dim or turbid water. Despite its bulk, it can make surprisingly sudden movements when hunting or startled.

In the wild, False Perruno Catfish inhabit warm, slow-moving or moderately flowing rivers, tributaries, flooded forests and backwaters. Juveniles may use submerged roots, branches and other structure for shelter, while adults become increasingly dependent on spacious channels and deep pools.

They are ambush predators that swallow suitably sized prey whole. Their striking appearance makes them appealing to large-fish keepers, but their eventual size and predatory behaviour place them firmly in the category of specialist aquarium fish rather than ordinary community catfish.

False Perruno Catfish are native to tropical South America, occurring across major river systems including parts of the Amazon and Orinoco basins. Their range includes Colombia, Venezuela, Brazil, Peru and neighbouring countries, depending on the drainage population.

A full-grown False Perruno Catfish requires a specialist aquarium or indoor pond of at least 3,000 litres, with substantially more space preferable for a large adult. A practical adult enclosure should be around 300 cm long, 100 cm wide and 100 cm deep or larger, with a tightly secured cover because large catfish can jump when disturbed. Use powerful, protected filtration and strong oxygenation while avoiding excessive turbulence. Provide a broad open swimming area, shaded retreats and sturdy driftwood or smooth rockwork, leaving plenty of room for turning. Use a fine sand or smooth rounded-gravel substrate and avoid sharp decorations that could damage the skin and barbels. Maintain warm, clean, well-oxygenated freshwater at about 24–28°C with a pH of roughly 6.0–7.5.

Up to about 100 cm (39.4 inches) in total length has been recorded, although aquarium specimens are more often around 50–70 cm (19.7–27.6 inches). Females may become heavier-bodied than males, but a consistent sex-specific maximum length is not well established.

This carnivorous predator should be offered a varied diet of appropriately sized whole fish, prawns, shrimp, mussels, earthworms and quality sinking carnivore pellets. Young specimens need relatively frequent meals, while adults should be fed less often with portions suited to their slow, powerful growth. Use reliable, disease-free food and avoid relying on feeder fish or fatty mammal and bird meat, which can introduce pathogens or lead to nutritional problems.

False Perruno Catfish can be housed with other exceptionally large, robust South American fish such as mature arowanas, large pacu, big plecos and suitable large cichlids, provided the aquarium or pond is genuinely spacious. Tankmates must be too large to fit in the catfish's mouth and strong enough to tolerate its nocturnal activity. Small fish, ornamental shrimp, crayfish and peaceful species that can be swallowed are unsafe companions. Avoid fin-nipping fish, highly aggressive territorial species and overcrowding, as this catfish may also injure tankmates while feeding.

False Perruno Catfish are not commonly bred in home aquariums. In nature, spawning is associated with seasonal changes in river conditions, increased water movement and flooding. They are egg-scattering, migratory fish, and successful breeding generally requires very large specialist facilities, mature adults and carefully managed environmental triggers. There is no dependable small-aquarium breeding method for this species.

Reliable external differences between male and female False Perruno Catfish are poorly documented. Mature females may be broader through the abdomen and heavier overall, while males are sometimes slimmer, but these features are not dependable without comparison of mature fish or examination by an experienced specialist.