On a flat bed of sand in another tank, the antlered crab Paromola macrochira, which lives in the ocean at a depth of 400 meters, is standing to attention, motionless yet fully alert.
平鋪沙子的大水缸裡，棲息於四百公尺以下深海的「巨螯擬人面蟹」昂首挺胸，體型龐大的牠老神在在，一動不動。