Stuff of Nightmares, Pt. 1: Parasitic Tongue

This little beastie is an 1-inch-long isopod called Cymothoa exigua. Its unique lifestyle involves fastening itself to the inside of a fish’s mouth and then gradually devouring the tongue, slowly replacing the organ with its own body, so that the fish winds up with a fully functioning artifical tongue made out of parasite. For a more in-depth explanation, see this nice article at