River Otter Giant River Otter as the common name the scientific name Pteronura brasiliensis in the Mustelidae family with the Carnivora order the normal size of Otter is Length head/body :34 -55 in (86-140 cm) tail length :13-39 in(33-100 cm); height at shoulder 16 in (40 cm) weighing 57-75 lb. Key features are Large otter with short, glossy fur that looks black when wet ;often white or creamy nose and throat; webbed feet tail tapers and is flattened with a flange along each edge. Common habits: Read more [...]