This show is awesome. I just watched them follow these bait balls of small fish and the feeding frenzies that happen around them. This ball of mackerel got found by a bunch of dolphins in the sea, but the dolphins were followed by seabirds in the air. The dolphins go after the mackerel, the mackerel shoot up, and then the birds dive down and it becomes this back and forth feeding frenzy, and then giant tuna show up and you got the birds diving like 30-50 ft underwater and OMG.
