The BBC reports
that a bizarre bug that literally eats the tongue of a fish and then manuevers itself to become the "replacement tongue" for the fish has now been discovered in Britain.
The bug - which has the scientific name cymothoa exigua - was discovered inside the mouth of a red snapper bought from a London fishmonger.
The 3.5cm creature had grabbed onto the fish's tongue and slowly ate away at it until only a stub was left.
It then latched onto the stub and became the fish's "replacement tongue".
The BBC article says that scientists claim the bugs only eat fish tongues which is good news for us humans. More information about the unusual bug (cymothoa exigua) can be found here