Starlings
I remember describing to a priest a shoal of small fish in the harbour in Arrecife. When they were disturbed, they seemed to move as one with a flick of a communal tail. The priest said that is was probably something to do with water pressure between the fish. That would have made a good reply to the radio programme that I mentioned, Mystery Hour. Then how do starlings move as one? It is called a murmuration.
I believe that the birds are all connected, the fish as well, as are all living things. How, I don’t know, but Rupert Sheldrake talks about it a lot.