Ocean (some 300 to 400 m deep) around Japan , where it feeds on dead animals and shellfish . It is believed to have a life expectancy of up to 100 years. Conservation status DD Scientific classification Kingdom: Animalia Phylum: Arthropoda Subphylum: Crustacea Class: Malacostraca Order: Decapoda Infraorder: Brachyura Superfamily: Majoidea Family: