DOLPHINS AND PORPOISES Dolphins and porpoises are mammals. They breathe air and give birth to living young then they suckle. They belong to the order or group of mammals called cetaceans, which include whales. Dolphins have beaklike mouths. Porpoises have bunt mouths and are smaller than dolphins. But both dolphins and porpoises are toothed whales, and their close relatives include the killer, sperm and pilot whale. Cetaceans are mammals that returned to the sea. Hind …showed first 75 words of 315 total…

…showed last 75 words of 315 total…dolphins, which acts as a “nurse”, then rush into the surface for the baby’s first breath of air. They introduce the baby to the deeper water and longer stays under the water the first few weeks. At first they return to the surface for the baby to suckle it’s mothers milk. Usually only one baby is born at a time. It spends a full year feeding on milk and strays from its mother