The dolphins chased the porpoises at high speed, rammed and then drowned them. In one particularly violent attack, three dolphins corralled their victim before seven others joined them to ram the porpoise to death. Cotter found most shocking the fact that two dolphins remained behind to play with the carcass before pushing it towards his boat.
He believes that the attacks are “object oriented play” during the breeding season by young males who cannot get access to females because of competition from older males.
I hear Rick Perry and Aaron Schock have used that excuse too. The competition is just too fierce.