Tongue-eating bug found in fish. In Britain a bug has been discovered that eats the tongue of a fish down to a stub, then attaches itself to become a replacement!
Here's a better photo of the parasite that eats its fish host's tongue, and then pretends to be the tongue.
Cymothoa exigua, a crustacean, is the only known parasite that effectively replaces a body organ. It makes its home in the mouth of a fish, where it drains blood from the tongue until it withers and dies. It attaches itself to the remaining stub and the fish is actually able to utilize it as a replacement tongue to draw in and manipulate food, which the parasite shares.
