At first glance the stonefish doesn’t look like a speedster. They’re bulky and just sit there like a… stone. Well their body does anyway. Their mouth is another story. It’s designed to move independently of the rest of the body, which is all a part of its plan.

Due to its awesome camouflage and tendency to sit statue still, fish don’t see the stonefish when they swim past until it’s too late. What looks like a harmless rock or a cluster of marine algae can turn into a gaping mouth that comes out of nowhere and sucks them in whole.