Talk about leaving a bad taste in the mouth.
There are about 380 species of tongue-eating isopods, and most target a specific fish species as their host, according to the Two Oceans Aquarium in Cape Town, South Africa. This type of isopod enters a fish’s body through the gills, latches onto the tongue and begins to feed, releasing an anti-coagulant to keep the blood flowing. The parasite grips the base of the tongue tightly with its seven pairs of legs, reducing the blood supply so that the organ eventually atrophies and drops off, according to the Australian Museum.