For the human fish, here is everything about the underwaterworld and its exploration that is connected with science today. Aspects of undersea activity include reliable surveys of work being done from fish finding to photography; on equipment- the aqua lung, chambers for television cameras and so forth; and on the U. S. oceanography institutes such as Woods Hole and La Jolla. How to dive, how to get into diving profesionally and what diving does the world over are well presented here. Lynn Poole's as a popular science reporter should help the text along considerably.