By Sarah Brown On a warm, humid morning, along the Içana River in Brazil’s upper Rio Negro Basin, researchers observed a ...

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

Otters are among the most adaptable mammals alive, thriving everywhere from icy coasts to steamy rainforests. This list reveals the eight largest species, from the massive giant otter of South America ...

Most otters are small, with short ears and noses, elongated bodies, long tails, and soft, dense fur. They’re super swimmers and can even nap in the water! They’re so cute and playful that many people ...