Physical 

The river otter has an elongated body with a broad, flattened head.  Body size ranges from 26 to 40 inches in length, not including the tail, and can weigh up to 18 pounds. Their tales can measure from 12 to 19 inches in length. Males are approximately 17 percent larger than females.

Habitat

 L. canadensis live in clean rivers, lakes, wooden ponds, and estuaries.  They range from New Foundland south to Florida.

Feeding 

Northern River Otter feed on a variety of fish, small mammals, and invertebrates. They use their long whiskers to detect prey underwater.