Whales & Dolphins (Collins Gem)

This Gem explores and explains the world of whales and dolphins. Over 50 species of whale, dolphin and porpoise are illustrated with the author's own photographs. Aspects covered include: evolution; identification; biology; zoological categorization; feeding habits; and predators. The book answers commonly-asked questions, such as "how intelligent are dolphins?" and "should whales be kept in captivity?", and discusses the sensitive subject of whale conservation.