The redtail catfish, Phractocephalus
hemioliopterus, is a pimelodid (long-whiskered) catfish named
for its orange-red caudal fin. In Venezuela it is known ascajaro and
in Brazil it is known as pirarara. It is the only extant species
of the genus Phractocephalus. This fish originates from South America in
the Amazon,Orinoco, and Essequibo river basins. Despite reaching
1.8 m (5 ft 11 in) in length and 80 kg (180 lb) in
weight, this fish is a common aquarium fish.
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