Geographic Range The Japanese spider crab Macrocheira kaempferi is mostly limited to the Pacific side of the Japanese islands, Konshu and Kyushu, usually at a latitude between 30 and 40 degrees North They are found most often in the Sagami, Suruga, and Tosa bays, as well as off the coast of the Kii peninsula The Japanese spider crab as the name suggests is a type of crab that resembles a spider It is one of the largest known arthropods (leg span wise) in the world This species of marine crabs are found in the Pacific side of a number of Japanese islands The Japanese spider crab scientific name is Macrocheira kaempferiThe Japanese spider crab is a large catch for any fisherman With a leg span of 13 feet (4 meters) and an average weight of around 40 pounds (16 kg), it claims the title of largest crab It may also have the longest lifespan of any crab, living to be 100 years old
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