This is illustrated nicely on the BBC series "The Hunt". Not only to they corral but they work with other fish in this process. There's a great scene where a Bl

This is illustrated nicely on the BBC series "The Hunt". Not only to they corral but they work with other fish in this process. There's a great scene where a Blur Whale comes out of the corner opening it's mouth and just swallows a massive gathering of krill. Highly recommended!