Scientists have determined how archer fish are able to blast prey with a stream of water. The fish can blast insects with a water jet 6 times their muscular power. The fish are able to push their tongues into a groove in their mouths, which forms a gun-barrel-like shape to shoot water through. The fish then close their gills to shoot the water. The energy builds at the front of the water jet so that the insect is hit with a force strong enough to knock it into the water, where the fish can eat it.