Underwater swimmer Hannah Fraser has been fascinated with mermaids since she was three years old. Hannah, 36, an Australian who now lives in LA, made her first mermaid tail at the age of nine, after seeing the film Splash with Daryl Hannah. Now she works as a model, actress and performer, swimming with whales, dolphins, stingrays and even sharks.
Orcas (Orcinus orca) show their smarts by working together to whip up a meal. Here, a pod hunts for herring in Norway’s Andfjorden. Members of the pod coordinate their moves, herding a mass of herring into a manageable ball. They then whip their tails against the ball, stunning or killing the fish.
Discover more about #dolphins clicking in this interactive #graphic. When one of Earth’s smartest creatures vocalizes, it fuels a heated debate among scientists: Are dolphins actually speaking a complex language?