If fish could describe this event, they would probably tell you that it is like being carpet-bombed with a chance of getting eaten. In the video below, a large flock of pelicans show off their coordination by plunge-diving for fish. Diving is one of the most effective hunting methods for seabirds, as it allows the winged predators to use the momentum from their plunge to chase after fast-moving prey. While it may seem natural, it actually takes pelicans several years to master this method, and some inexperienced birds often injure themselves on a botched dive.
Used correctly, however, there are few words to describe it other than “spectacle.”