That's how this blackspot tuskfish has been described after it was photographed smashing a clam against a rock in order to access the meat inside. Whether the rock qualifies as a "tool" is discussed at the
Wired Science link.
Image credit: Coral Reefs/Scott Gardner
Thrushes and blackbirds use stones as anvils - it's stretching a point to call banging something against the scenery as tool-using.
ReplyDeleteYou might as well say it's using the water as a tool when it swims by pushing against it.