We have seen groups of up to 15 whales cooperatively feeding for herring using bubblenets. The whales blow a net of bubbles around the herring, concentrating them into a tight group, then the whales surge up through the ball of herring with their mouths agape, taking in tons of herring. These groups are matriarchal in nature, with the matriarch (mother) being in the center of the group, and her offerspring around her.

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