Got it!

The seagulls here are clever. They wait for the big fish in the sea to capture a little squiddly silver fish, around which they form a ball, competing with each other to gobble it up. In the process, the fish-ball chases the prey upwards to the surface of the water, at which point a seagull casually floating nearby dives and catches it - or better still, dives from the air. It's a spectacle we could watch over and over again.