They act synchronously-obviously, constantly “talking” to each other. American fishermen on the Atlantic coast have long been watching the original way of fishing, which show dolphins.
In order to catch fish dolphins cooperate in small groups of two or three individuals. Having chosen a jamb of fish, they drive it to the coast. A massive body of beaters, about half a hundredweight each, roll in front of the wave full of fish.
The wave incident on the beach and goes and throw out the prey helplessly struggling in the sand. Then dolphins crawl out on the shore, turn over on their side, rest with a fin, and move from fish to fish. In a few minutes “picnic” ends.