A bizarre fish with human-like lips and teeth has become a viral hit, with over five million views on social media. The video ...

Its mouth can extend over half the length of the fish's body. The fish can protrude its jaws longer than any other on the planet. Peter Wainwright of UC Davis recorded this video of the wrasse ...

Welcome to the abyss. The viperfish (pictured above) is a fierce predator, with fangs so big that its mouth can't close over them. Instead, they slide up the front of the fish's face when it shuts its ...

At first glance, the world’s second largest fish might seem menacing: Its gaping mouth has six rows of teeth in its upper jaw, and nine rows below, for a total of about 1,500 tiny, hooked teeth.

Stressed fish tend to become unhealthy fish, so it's very important that fish farm operators spot stress as early as possible ...