Wow. This has to be some of the best footage of dolphin porpoises ever captured.
Some fishing enthusiasts go tuna fishing in a center console off of Santa Cruz. They built a custom fishing enclosure for their GoPro camera that they could tow behind the boat presumably to get footage of the fish hitting their baits. Then some photogenic dolphin porpoises show up and you really have to see the video to understand how special the footage is.
I could watch this video on loop over and over again (minus the tuna part at least!).