These whales direct air bubbles to corral fish, so they can easily filter-feed by swimming through the net. The most interesting thing about bubble netting is scientists believe that the techniques used are unique to each individual, pod and region.
NOAA reported witnessing what they have coined as, "double-loops." Where a whale begins deep, creating an upward spiral of bubbles to herd its prey, then smacks its fluke on the surface and dives down to lunge up through its prey - mouth open. Some scientists have even seen humpback whales robbing prey from bubble nets created by other whales.