in crevices between rocks and dart out to catch passing prey such as angelfish. In aquariums gulper catfish will feed during both day and night, but it is suspected the species is nocturnal and crepuscular in the wild, giving it an additional advantage when hunting along river banks for its often sleeping prey. References Auchenipteridae Catfish of South America Freshwater fish of Brazil Freshwater fish of Colombia Fish of Venezuela Fish described in 1857 Taxa named by Rudolf Kner