Mysteries of Eels Unveiled

This isn't a snake. And for thousands of years, humanity had NO idea where it came

from. Eels are actually fish... but we have never seen them mate in

the wild. They all migrate thousands of miles to one mysterious place,

the Sargasso Sea, to have their babies... and then die. Their blood is literally poison.

It's toxic if eaten raw, which is why eel is always cooked. They can breathe

through their skin, letting some species wriggle across wet land to find new ponds.

And that Electric Eel? Not actually an eel. It’s a totally different

kind of fish.