This giant manta ray seems like the ultimate monster of the deep, with its huge gaping mouth apparently ready to devour anything in its path. But don't worry, the tiny blue fish in this picture - ...

When they meet, sarcastic fringeheads can get mouthy. These bug-eyed, bright-lipped fish often open their giant jaws to show off the psychedelic hues splashed across the inside of their mouths. And ...