Dolphins are super smart and like other smart mammals (humans, most of the time), they sometimes do stuff for absolutely no reason other than to have fun. Take these dolphins, there are probably like 50 of them waiting for the waves to come and when it does, they all ride it like gleeful little spring breakers.
Of course, dolphins surfing isn't a new thing, it's just nice to see the overhead footage of the dolphin line up. Jennene & Dave Riggs write:
Dave filmed this amazing aerial vision with his quadcopter off Esperance, along south Western Australia's beautiful coastline. Huge pods of bottlenose dolphins cruise the shoreline and surf the crystal clear turquoise waves.