National Geographic : 1952 Nov
© National Geographic Society 692 When the Ring Is Tossed, the Young Dolphin Catches It and Hurls It Back Playful Tursiops truncatus, the gray dolphin or inshore por poise, is warm-blooded, just like man, his fellow mammal. An air breather, he surfaces approximately every 30 seconds to in hale, though he might remain submerged seven minutes. He was born in water, not from an egg like most fishes, but alive like a baby. Soon his mother began suckling him. Pitching the inner tube is a favorite pastime. If it is thrown from a group, this performer returns it to the tosser's hands.