There are tons of terrifying creatures lurking in the dark, cold, pressurized environment of the deep sea, from a ginormous relative of the garden pill bug, to fish with translucent heads.

The vast majority of our planet remains a complete mystery, hidden beneath miles of crushing water where sunlight never penetrates. In this eternal darkness, evolution has taken a path so bizarre that ...

The curious minds at What If explore the scariest things in the ocean that you didn't know existed.