 It was like flapping its fins and stuff, and someone on our boat said I guess it's like a way to, I think, either assert dominance or like as a threatening behavior to kind of tell the others to go away or something like that, but I thought it was really neat. It was something I'd never seen before, and one of our co-anglers, Skip, is from Alaska, and he knows quite a bit about marine biology, and he explained that when this happens, it's quite often a mother trying to protect its young, particularly from orca whales.