Feeding frenzy

For today's lunch break, Kel and I sat on the rocky point near our house and watched the local flock of pelicans busily feeding on a school of fish. The pelicans swirl around in flight, checking out the water below, then fold their wings and dive headfirst from dizzying heights. The big splashes in the photo are where pelicans just plunged into the sea.

The two dark shapes in the foreground? Surfers. All I could think while I watched was: What else is feeding on that school of fish?