Ages 4 to 5 years. There are over 30 species of dolphins. They live in almost all oceans of the world. Some prefer deep ocean waters, some inhabit coastal areas, and some even live in estuaries and rivers. A few dolphins, such as bottlenose dolphins, live in several types of habitats. Children will be surprised to learn that orcas and pilot whales are true dolphins, but river dolphins and porpoises are not! This book will clarify many misconceptions and introduce children to all 33 species of "true" dolphins.