Look ma, no hands: fish using tools

Humans were once thought to be the only tool users, but in recent years other primates and even birds have been shown to use tools. Now researchers have evidence of a tusk fish smashing open shells on an anvil to access the meat inside.

“The pictures provide fantastic proof of these intelligent fish at work using tools to access prey that they would otherwise miss out on,” said Dr Culum Brown of Macquarie University.