Historical diving bells, Greek sponge divers, world war two frogmen and record-setting breath hold divers compete for space with sharks, turtles, dolphins and sea slugs. From Ireland to Florida, Papua New Guinea to Vienna and the Bahamas to Seychelles, this title provides a view from a glass bottomed boat - on an unfamiliar destination.

The paperback edition of Ecott's celebration of scuba diving, which interweaves, reportage, history and science to create a vivid picture. " Non-divers will be captivated by Tim Ecott's engaging mix of personal odyssey and hard science." )The Times Literary Supplement(.