Humpback whale (Megaptera novaeangliae) executing a reverse tail slap, with dorsal surface hitting the surface of the ocean. This was an adult female with an accompanying calf. The mother and baby spent several hours playing together, slapping the ocean surface with their tails, breaching, and engaging in other activities. The calf was Orion, the 13th calf I counted during the 2007 season in Vava'u, Tonga.
{}