Sciades couma

The Couma sea catfish (Sciades couma), also known as the Pemecou sea catfish, is a species of catfish in the family Ariidae. It was described by Achille Valenciennes in 1840, originally under the genus Bagrus. It inhabits estuaries and rivers in Guyana, French Guiana, Suriname, Brazil, Trinidad and Tobago, and Venezuela. It reaches a maximum total length of 97 cm (38 in), more commonly reaching a TL of 50 cm (20 in). It reaches a maximum weight of 30 kg (66 lb). Its maximum known life expectancy is 5 years.

The couma sea catfish has an extensive diet, consisting predominantly of crabs including Aratus pisonii, Pachygrapsus gracilis, Uca rapax, Uca maracoani, and Ucides cordatus, as well as other crustaceans such as shrimp in the genera Alpheus and Macrobrachium. It also feeds on bony fish in the family Ophichthidae and the genus Hypostomus, as well as ariid larvae, gastropods, insects, and debris such as skin from mammals, and leaves and twigs from terrestrial plants.