In Australia's Great Barrier Reef , a professional diver has photographed a blackspot turkfish smashing a clam against a rock to get the tasty treat on the inside—this appears to be the first documented case of a fish using a tool . But some people argue that this behavior, which is similar to a seagull cracking open a shell by dropping it onto a hard surface, does not constitute tool use because the "tool" is fixed and the animal never actually holds it. See a nice round-up video of the news and the tool-use debate at HuffPost . Image: Scott Gardner/Coral Reefs , DOI:10.1007/s00338-011-0790-y
