Showing them who really owns the ocean, the porpoises dived and twisted in the surf in San Diego, California. Spectators watching from the beach were treated to a comical show as the professional surfers were put to shame by the flipping and soaring creatures at Black's Beach, as large surf started to roll into the county.But the National Weather Service warned beach users that the surf could be dangerous. A meteorologist said: 'A series of large long-period northwest swells generated by storms moving over the North-Central Pacific will bring high surf and strong rip currents to portions of the Orange and San Diego County coast though most of this week.'The carnivore mammals, which weigh around 1,100lbs, can breach up to 16 feet out of the water and this pod showed off their streamlined skill.Dolphins can reach speeds of more than 18 mph and travel in social groups, communicating with each other by a complex system of squeaks and whistles.They cover huge distances during migration and at this time of year they head south to the cooler waters.Feeding habits and food fish movements may also account for the seasonal movements of some dolphins.(dailymail.co.uk)ANN.Az