From the ArcaMax Publishing, Trivia Newsletter:
http://www.arcamax.com/news/trivia/s-637223-364300
The electric eel has thousands of electric cells running up and down its tail. Vital body organs, such as the heart, are packed into a small space behind the head. They use their electric sense to "see". Their electric sensors act like radar. They send out weak impulses which bounce off objects.
This news arrived on: 10/26/2009