Which animal has two brains?

Animals are weird. 

For how concerned we get about UAPs and what aliens look like, just take five minutes searching through images of animals right here on Earth and little gray dudes will be the least of your worries. We have mammals with duckbills, fish with unicorn horns, something literally just called a “Goblin Shark” — and that’s just scratching the proverbial surface.

I mean, human bodies are pretty weird too, but at least we know a lot about them and they mostly follow the same rules. When it comes to the animal kingdom, any rules from the human world go right out the damn window.

There are extra hearts, weird colors, and in the case of this animal, an extra brain. What animal has this weird biological feature?

Click START to answer.