Spineless: Portraits of Marine Invertebrates, the Backbone of LifeIn Spineless, acclaimed photographer Susan Middleton explores the mysterious and surprising world of marine invertebrates, which represent more than 98 percent of the known animal species in the ocean. They are also astonishingly diverse in their shapes, patterns, textures, and colors in nature's fashion show, they are the haute couture of marine life. This collection of more than 250 remarkable images is the result of seven years of painstaking