Physical 

American Eels have a unique snake-like shape and vary in coloration from green-brown to yellow-brown. Dorsal (back), anal (underside), and caudal (tail) fins are all continuous and connected. The mouths are large and the lower jaw is longer than the upper. Adult females grow to 4 feet, males to 2.5 feet.

Habitat

A. rostrata is catadromous (live in freshwater rivers and spawn in the ocean). For this reason, the eel can be found in fresh and coastal waters throughout North America and Northern South America.

Feeding 

American Eels are nocturnally active omnivores, feeding at night on insects, mollusks, crustaceans, worms and other fish.