Watch this amazing overhead view of a humpback whale surfacing through a bait ball of fish. The drone footage was recorded off the coast of La Jolla, California by DolphinDoneDom.
A bait ball happens when small fish cluster in a tightly packed spherical formation about a common center. It is a last-ditch defending measure used by small schooling fish when they are frightened by predators. Small schooling fish are consumed by many types of predators, and for this reason, they are called baitfish or forage fish. [source]