Eels are mysterious fish. For the longest time, it was unknown as to where they spawned. Juvenile eels look very different than adults so that people also used to think that they were two different species of fish. Eel can live in fresh as well as salt water. As long as the ground is wet enough, they can move on land. Eels are momentarily threatened by overfishing. Obstacles between fresh and salt water also form a problem. In 2007, the eel was declared as a protected animal species. A European recovery plan has been developed.