The Giant Otter,(also known as the river wolf) is the longest of the world’s otters, as well as the largest. It is native to South America but is endangered and is also very rare in captivity. The Giant Otter can reach up to 6 ft (1.8 m) in length, and weigh up to 76 lb (34 kg).
The Giant Otter feeds mainly on fish, such as catfish, piranha, and perch, but will also feed on crabs, small caimans, and snakes, including small anacondas. The Giant Otter is a highly social animal and lives in extended family groups of between 4-8 members