6. The Colossal Japanese Spider Crab: A Giant of the Ocean Floor The Japanese Spider Crab (Macrocheira kaempferi) is a colossal crustacean and the largest known arthropod, with a leg span of up to 12 feet (3.7 meters). Found in the waters around Japan at depths of 150 to 800 meters, this extraordinary species is… Continue reading 12 Bizarre Deep Sea Creatures