Friendly Wave the dolphin salutes her fans in the Port River Wave the dolphin treats onlookers to her frolics on the Port River at the weekend. Picture: Barbara Saberton Source: Supplied WINTER may be in full swing but the chilly weather has not stopped Wave the dolphin from jumping for joy. She was seen frolicking in the Port River at the weekend with about six friends, treating onlookers to a performance guaranteed to brighten any day. Adelaide Dolphin Sanctuary Action Group volunteer Barbara Saberton captured Wave's antics on camera between the Birkenhead bridge and Jervois bridge on Sunday morning. "There were about six of them all together and Wave just decided to do her own thing and it was on for young and old for about 10 minutes," she said yesterday. It's a familiar sight for the Salisbury resident, who has volunteered with the action group for the past decade and helps authorities identify dolphins. What I captured with the camera just proves how intelligent dolphins are. I love being able to do something positive to help them," she said. The Environment Department warned against feeding the animals. "It encourages dolphins to stay in areas where people are fishing and can increase their chances of becoming entangled in fishing line or hit by boats," a spokeswoman said.