, , : Home Suggest Stories About Us Staff Contact Us Log In Register to Comment Bulletin of Atomic Scientists , Climate Central : Socolow updates wedges . Media . yawn LiveScience , SFChronicle , SJMercury News : Fish figure out that smacking clams against rocks yields food One may have seen videos of birds dropping shelled prey onto rocks to break them open , technically a form of tool use . Now comes word of a similar maneuver by fish . A type of wrasse , the orange-dotted tuskfish that lives in the tropical Pacific , has learned to break open clams by smacking them against rocks . So reports researchers at the University of California , Santa Cruz . Thus tool using , while not quite up to mastery of the iPad or even of a pair of pliers , is known in a diversity of animals chimps pulling