Two blue whales, a mother and her calf, swim through the open ocean in this aerial photograph. The calf is blowing (spouting, exhaling) with a powerful column of spray. The blue whale is the largest animal ever to live on Earth.
Phillip Colla is a photographer and natural history writer specializing in wild marine mammals, the California kelp forest, and inhabitants of remote eastern Pacific islands. His photographs, including images of whales, dolphins and pinnipeds, are primarily taken while breath-hold diving.