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Extendable Jaws Gave Fish an Evolutionary Edge

The ability, known as protrusion, allows fish to extend their jaw and snap up otherwise elusive prey, making them effective hunters.

October 9, 2015
9:55 AM EDT
This photograph shows a Maori wrasse (Cheilinus undulatus) protruding its jaws. Most modern fishes have this ability, which reduces the distance between the fish and its prey. | João Paulo Krajewski