AkXpro used a drone to capture this awesome footage of a pod of humpback whales feeding on fish off the coast of Alaska. It gets really intense at the 0:49 mark. The whales form a circle, then lunge out of the water.
Ark in Space explains that the whales are engaging in bubble feeding. This means that they move into a circular formation, then breathe out bubbles while rising to the surface. The bubbles form a wall that the fish can't swim through, concentrating them into the center where the whales can swallow them en masse.