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This Worm Looks Like A Penis

And it has teeth.

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This is a Priapulid. Its informal but demonstrably more descriptive name is the penis worm.

Bruno C. Vellutini / Via

It's pretty fierce. It can actually turn its mouth and throat inside-out, exposing a jagged array of gnarly teeth, which it uses to drag itself across the sea-floor or devour its prey.

The throat has been described as resembling a cheese grater.

There are actually around 16 species of penis worms alive today. Don't worry though, they are generally confined to the types of marine environments in which most other things can't survive.

The real time to worry about penis worms would have been 500 million years ago, during the Cambrian.

Alex Kasprak for BuzzFeed

According to paleontologist Martin Smith, back then "they were fearsome beasts, and extremely successful ones at that."

In fact, they provide us with the earliest evidence of cannibalism. Some penis worm fossils show bits of other penis worm fossils inside of them. These flesh-eating beasts would eat anything and everything around them.

The fossil record shows that penis worms were everywhere back then.

Martin Smith / Via

Penis worms were some of the earliest animals to splash onto the scene during a massive expansion of new life forms called the Cambrian explosion.

Science Writer, Fossil Beastmaster

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