The slingjaw wrasse, Epibulus insidiator, is a species of wrasse with an astounding jaw. Its mouth can extend over half the length of the fish's body. The fish can protrude its jaws longer than ...

In the course of studying wrasse skulls, an evolutionary biologist found a parasite hiding inside a fish’s mouth. And not only had the louse eaten the fish’s tongue – it effectively replaced it.

You’d be hard-pressed to find any fish daring enough to voluntarily enter a top predator’s mouth, but that’s precisely what a humble fish called the cleaner wrasse does. These fearless fish swim ...

Fish lips may be fixture of the selfie generation, but for one tropical fish, a fleshy pout helps them survive. The tubelip wrasse (Labropsis australis) relies on self-lubricated lips to eat ...