The giant otter or giant river otter[4] (Pteronura brasiliensis) is a South American carnivorous mammal. It is the longest member of the weasel family, Mustelidae, a globally successful …

The Giant otter (Pteronura brasiliensis) is a South American carnivorous mammal. It is the longest member of the weasel family, Mustelidae, a globally successful group of predators.

Oct 9, 2023 · The giant river otter, Pteronura brasiliensis, also known as the giant otter, is the world’s longest, and second-heaviest, otter species. It is native to South America, where it is …

Giant otters are the largest of any otter in the world growing up to 1.8m. They are double the size of world’s smallest otter, the Asian short-clawed otter (below).

Find out why the world’s largest otter has become endangered. Learn how their webbed feet, fur, and ears are perfectly adapted to their riverine environment.

Discover the Giant Otter’s behavior, habitat, and conservation needs, and learn how you can help protect this endangered species.

Find out more about the Giant otter, the largest species of otter in the world, native to the Amazon region.

Sometimes referred to as “water dog” and “river wolf,” the giant river otter is the largest member of the mustelid family, which includes otters, weasels, and ferrets. They are active during the day …

Jul 17, 2025 · Giant otters (Pteronura brasiliensis) are the largest members of the mustelid family, inhabiting freshwater ecosystems across the Amazon Basin. With bodies reaching up to 1.8 …

In addition to its common name, giant otter, P. brasiliensis has also been called the Guiana flat-tailed otter, winged-tailed otter, and margin-tailed otter. Pteronura brasiliensis moves through …