Learn all about the amazing world of dolphins and porpoises, and follow their lives from calf to adult.From feeding to leaping - your total dolphin and porpoise guide.Did you know that some groups, or pods, can have thousands of dolphins in them? Would you believe that Dall's porpoise can reach a speed of 55 kilometres an hour?Discover everything you ever wanted to know about these incredible animals - where they live, how they grow and learn, and the dangers they face.By the time you've finished reading, you'll be a dolphin and porpoise expert!The Animal Lives series:This series is a great introduction to the world of animals – where they live, how they grow and learn, what they eat and the dangers they have to face. Animal Lives has all the facts on your favourite ocean animals.