These dive-bombing, feed-frenzied pelicans found a good spot, I guess.
The ones that look like downward-heading jets are after fish under the surface.
You can spot the ones about to dive when they look like the 3 in the top right corner.
At times one of these large birds will dive like this while you're sitting out on a surfboard, which is when you realize how fast they're going, and how big they are.