The author's text is as sharp as the photographs with which he has illustrated it. One, and sometimes two, black and white pictures per page show typical denizens of aquariums, oceanariums and marinelands. Since these are far less numerous and accessible than zoos or museums, the book can bring to a large number of inland children a visual idea of comparative sizes of marine life and anatomical detail. Much of the information and many of the pictures come from California's Marineland of the Pacific where trained dolphins and whales display before audiences an intelligence not usually associated with deep sea creatures. The work of the oceanarium, and some of the staggering problems presented by the capture, care and feeding of its exotic guests are explored -- i.e. one whale had a nervous breakdown, went into a decline and was stabilized by tranquilizers. How marine biologists use the captive fish for observation, and the methods of the curators in curing and training them, are a part of a very thorough look into the fascinating oceanarium routine.