The American Eel (Anguilla rostrata) is a fascinating species with a complex life cycle that spans both fresh and salt waters. These eels are born in the Sargasso Sea and migrate to riv... The American Eel (Anguilla rostrata) is a fascinating species with a complex life cycle that spans both fresh and salt waters. These eels are born in the Sargasso Sea and migrate to rivers and lakes across the East Coast of North America. They can grow up to 4 feet in length and are recognized by their slender, snake-like bodies. American Eels are nocturnal and feed on a variety of invertebrates and smaller fish. Their populations are in decline due to habitat loss, overfishing, and barriers to migration.Click here to read more about American Eel.