The Weird Tongue-eating Louse…

A parasite that replaces a fish’s tongue… with its own body!

Clownfish with tongue-eating isopod (Wikimedia Commons)

Imagine you’ve just landed a fish after a day on the water. You reach down to remove the hook and as you lever out the hook and open the fish’s mouth, what do you see staring back at you, but the face of a large bug which has replaced the fish’s tongue.