Can we fathom a framework for underwater fashion? Iconographies of underwater pursuits and their accompanying imaginaries find frequent form in fashion; think of Alexander McQueen’s Atlantis collection which featured his iconic ‘Manta’ dresses, digitally printed to conjure piscatory flesh, like armoured underwater camouflage. But what about the apparel actually worn underwater? If our knowledge of the undersea world is indebted to diving, then it is also indebted to the habitat apparel of deep-sea diving dress. The spheres of activity joined together by the practice of diving are webbed and vast, entangling the ancient art of pearl diving and spearfishing, histories of ornament, and the emergence in the eighteenth century of the discipline of natural history.