Fierce and gigantic, if you ever see or come across an arapaima fish along the rainforest rivers of the Amazon, then you will ...

It measured about 2.5 feet long and weighed about 6 pounds. Its head was “short” and “pointed” with “moderate-sized” eyes and small teeth on its jaws, tongue and the roof of its mouth.

It measured about 2.5 feet long and weighed about 6 pounds. Its head was “short” and “pointed” with “moderate-sized” eyes and small teeth on its jaws, tongue and the roof of its mouth.

The image shows a fish with its mouth being held open, showing a grotesque parasite. According to the state, the creature is a tongue-eating louse.

And when it comes to the cymothoid featured on social media posts, the Smithsonian Institute wrote that the “crustaceans sever the host fish’s tongue" — a claim that is only partly true.

The fish's tongue had been completely replaced by this so-called tongue-eating louse. You may like Scientists capture footage of bizarre deep-sea creature with parasite pig tails ...