I'm talking about this guy:
Apparently you might be eating a little crab with your snapper tonight...
This parasite attaches itself at the base of the spotted rosesnapper fish's tongue with the claws on its front three pairs of legs, and extracts blood from the tongue of its host fish. As the parasite grows, less and less blood is able to reach the tongue, and eventually the organ atrophies from lack of blood. The parasite then replaces the fish's tongue with its own body, by attaching to the muscles of the tongue stub. The fish is able to use the parasite just like a normal tongue, except that it has to share its food with the parasite.
Now go brush your teeth.
link thanks surfbum
