Traditional fisherman dragging net full of fish through water, fish jumping and attempting to escape, Laguna, Brazil [Brasil]の映像素材

An interesting collaboration has developed in Laguna: a pod of bottlenose dolphins drive fish towards fishermen who stand at the beach in shallow waters. Then one dolphin rolls over, which the fishermen take as sign to throw out their nets. The dolphins feed on the escaping fish. The dolphins were not trained for this behavior; the collaboration has been going on at least since 1847.