feature in deep-sea images taken by submersibles and are caught in large numbers by benthic dredges. Some species are so locally abundant that they form 'red tides'. Others support a variety of important fisheries. The taxonomy of squat lobsters has been intensively studied over the past few decades, making them one of the best known deepwater crustacean groups.

(23 species) from shelf edge and slope depths of south-western Australia is reported. Seventy-seven families are represented. Thirty-three per cent (175) of all species are suspected to be new species, eight per cent are new records for Australia, and a further 25% newly recorded for southern Western Australia.