Marbled Sailfin Catfish

Leiarius marmoratus inhabits the Amazon and Orinoco drainages and is immediately distinguished from other large pimelodids by its extraordinarily tall, sail-like dorsal fin, which when erect gives the fish a dramatic, almost prehistoric appearance. The body is covered in an intricate marble of dark brown and cream patches.

Adults can reach 80 cm and are powerful swimmers that generate substantial waste, requiring very large tanks with efficient filtration. They are more omnivorous than many of their relatives and will graze on fallen fruit and plant matter in the wild as well as taking fish and invertebrates.

Unlike more aggressive pimelodids, Leiarius marmoratus is described as semi-aggressive and can be housed with other very large, robust fish. Juveniles are occasionally available and grow rapidly in ideal conditions.

Water: 22–28°C, pH 6.0–7.5, soft to moderately hard; large weekly water changes critical. Tank: Minimum 1500L; robust filtration, open swimming space, large driftwood for shelter. Feeding: Omnivore; large pellets, prawns, fish fillets, occasional vegetable matter; feeds day and night. Breeding: No captive breeding records; seasonal spawner in the wild. Compatibility: Semi-aggressive; can coexist with other very large South American species; avoid small fish.