Another Reason to Stay Out of the Amazon

The electric eel has thousands of electric cells, with those organs making up four-fifths of its body. It lives in the Amazon River and its tributaries and is the most shocking animal on Earth; no other animal packs such a big charge. If attacking a large prey, a 9-foot-long eel can discharge about 800 volts. One zap could easily stun a human senseless. The larger the eel, the bigger the charge. The electric eel’s shocking power is so great that it can overtake its victims while 15 feet away.

And they're ugly, too.