A comprehensive book for the identification of South Australian marine invertebrates (intertidal to 30m depth). Includes over 870 species (all species identifications verified by experts) and over 1,500 high quality in situ colour photographs, with distribution maps, habitat information, and brief descriptions for all species. Covers all groups of macro marine invertebrates, including sponges, anemones, corals, jellyfish, bryozoans, worms, molluscs (snails, nudibranchs, bivalves, cephalopods), crustaceans (barnacles, amphipods, isopods, shrimps, crabs), echinoderms (seastars, sea urchins, sea cucumbers), and ascidians. Designed as a field guide - compact size, well bound, coated pages to resist repeated use, even with wet fingers! Ideal for students, scientists, snorkellers, divers, underwater photographers, shore fossickers, in fact anyone with an interest in southern Australian marine life.