At first glance, the world’s second largest fish might seem menacing: Its gaping mouth has six rows of teeth ... Swimming with their three-foot-wide mouths agape allows them to take in water ...

Also called an angler fish or sea-devil, the most horrifying part is the multiple rows of spiny teeth in its wide mouth. In ...

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 ...