The frogfish has a novel use for its bones. What looks like a wiggly worm in front of its mouth is actually a fleshy lure operated by a modified fin bone. But all the passing damselfish see is a juicy mouthful. Not only is the frogfish a master of deception, he is also perfectly camouflaged. A nearby shrimp is unlikely to see him until he moves, and by then it is too late. No matter how quick the shrimp's reactions, they just can not be quick enough, because the frogfish jaws move faster than muscle. It has a ‘trap-jaw’, pre-set under full tension. When triggered, the trap snaps open, increasing the mouth volume 10 times, and sucking the prey inside.