Select options Gulper Catfish (Asterophysus batrachus) $39.99 – $69.99 With its prehistoric appearance and exaggerated, oversized mouth, the Gulper Catfish is hard to mistake for any other species. A voracious predator, they are amazingly able to consume fish even larger than they are. In the wild, they tend to inhabit deeper stretches of blackwater rivers, and their eyesight is relatively poor – relying instead on their sensitive barbels and sense of smell to find prey. Gulpers are relatively adaptable in the aquarium, but as a scaleless fish can be somewhat sensitive to water quality. Although they can be finicky eaters at first, they will quickly learn to accept frozen, protein rich feeds and even pellets.