North American River Otter (Lontra canadensis)

The North American River Otter can survive in various habitats ranging from the icy rivers of Alaska to the humid marshlands of Florida. 

These mustelids have a streamlined body, weighing 25 pounds and standing up to 3.5 feet. They also have a broad, flattened head and thick fur, insulating them against the cold of their watery habitats.

These otters have a varied diet, with fish being their main staple. In addition to fish, they also eat amphibians, crustaceans, small mammals, and birds. 

Interestingly, North American River Otters perform a poop dance and use designated "latrine sites" for their waste deposits.