Do the preparation task first. Then watch the video and do the exercises. Remember you can read the transcript at any time.
These dolphins have worked out that fish out of water are much easier to catch.
By beating her tail down hard, this bottlenose dolphin stirs up the seabed.
And by swimming in a circle, she creates a ring of mushrooming mud around a shoal of fish: a fishing net made of mud.
As the net pulls tighter and tighter, the fish are trapped until there's only one way out – straight into the mouths of the waiting dolphins.