According to wiki....this sort of feeding is their inventive technique! A group of whales swims in a shrinking circle blowing bubbles below a school of prey. The shrinking ring of bubbles encircles the school and confines it in an ever-smaller cylinder. This ring can begin close to a 100ft in diameter and involve the cooperation of a dozen animals. Some whales blow the bubbles, some dive deeper to drive fish toward the surface, and others herd prey into the net by vocalizing. The whales then suddenly swim upward through the 'net', mouths agape, swallowing thousands of fish in one gulp. Plated grooves in the whale's mouth allow the creature to easily drain all the water that was initially taken in. It's truly awesome...have I said that already! I feel uber blessed to have been able to see such a thing, however, seeing a singular whale off the boat was officially common place! Go to Alaska. You may not see what I saw, but it doesn't matter, it's all pretty spectacular!!!!
See? He's waving at you!
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