Original air date: 29 October 2017
A more detailed look at it is below
Selected sequence
Fish intelligence ?
The tusk fish seems to know where to find the clams he wants. He goes to the edge of the reef and starts digging. He removes the rubbish piece by piece (top) until he finds what he wants (bottom).
Having found the clam he takes it back to his “kitchen” where he smashes it against the rocks; tool use (11’06-11’33).