Introduces readers to some of the largest and most acrobatic mammals in oceans and seas. Young students will discover the many types of whales and dolphins and learn about their behavior and how they survive in their watery world. Projects include making a dolphin mobile and a whale bookmark.

Previously published in series Kingfisher young knowledge: Boston, Mass. : Kingfisher, 2005.

What are whales and dolphins? -- All around the world -- Amazing creatures -- Ancient whales -- Built for the sea -- Coming up for air -- Filter feeders -- Clever hunters -- Underwater senses -- Sea songs -- Playing with waves -- Moving around -- New lives -- Social animals -- Making friends -- Human dangers -- Growing knowledge -- Looking and learning -- Project : dolphin movile -- Project : whale bookmark -- Project : does it float? -- Project : blue whale poster.