The bristle worm is an annelid worm of the class Polychaeta which are two words that essentially equate to one — Terrifying. They also sometimes get referred to as Eunice worms. That’s what this thing is and it had been living in this guy’s tank for around two years before he finally found it when he began breaking down the tank so it could be moved.

Nature show cameraman finds a deadly surprise guest hiding out in his bathroom
While on location in Indonesia, filming deadly reptiles in the wild for the BBC’s second entry into its Planet Earth series, cameraman Mark MacEwen discovered one of the beasts he had just captured on video had holed itself up in his bathroom. Not wanting to risk his own injury or worse at the jaws of...