When we were on our way back down from the top, we saw in the water the silhouettes of hundreds and hundreds of fish, and a massive flock of gulls flocking above it and diving down to try and catch them. The fish were big enough that we could clearly see them from hundreds of feet above, and they were at least as big as the gulls. The poor birds never got one that we saw, and I'm not sure they could've handled one if they'd caught it, but they kept trying anyway. Every once in a while, a fish would leap from the water. Were they trying for the gulls?