What is This See-Through, Nearly Invisible Fish?

Get a look at this crazy-looking, almost-invisible fish! Or is it even a fish?

What would best help a small fish survive all of its predators? Probably being invisible, right?

This video of a transparent fish has been gaining a lot of views via social media. Almost completely transparent, it certainly catches the eye and strikes a lot of curiosity. So, what kind of fish is it?

This crazy thought-to-be fish is actually a type of transparent eel larva called a leptocephalus.

It's actually thought that this diverse species group came to be during the Cretaceous period more than 140 million years ago.

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