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.