This Fish's Tongue is ALIVE!

Holy. Shit.
Scariest. Picture. Ever.
(you can tell by my excessive use of bold words)

Yes. That's a picture of the inside the mouth of a red snapper fish.

"A gross creature which gobbles up a fish's tongue and then replaces it with its own body has been found in Britain for the first time.
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". (bbc news)

Don't be scared, though, "scientists say the creature does not pose any threat to humans [yet!] and only attaches itself to fish tongues." FOR NOW!