First ever photo of fish using tools

Scott Gardner, a professional diver, was out diving Australia's Great Barrier Reef when he heard a strange banging noise under water and went to investigate. What he discovered was the blackspot tuskfish with a clam in its mouth. The fish was banging and slamming the clam against a rock in order to crack it open. Once it cracked, the fish ate the bivalve inside. Gardner, having his camera with him, was quick to snap up some shots of this fish and its apparent use of tools.

While tool use was once thought to be exclusive to humans, researchers have found animals such as primates, birds, dolphins, elephants and even octopuses that use some form of tool. While it was suspected that some fish may use similar behavior, it had never been documented until these pictures from Gardner.

Source:

http://www.physorg.com/news/2011-07-photo-fish-tools.html