Influence of temperature on survival and growth of larvae of the giant spider crab Macrocheira kaempferi (Crustacea, Decapoda, Majidae). (Arakawa, 1964; Hartnoll, 1969), Even though juvenile stages are well-documented in laboratories, reproduction information concerning M. kaempferi in its natural habitat is sparse. Based in Michigan, Keri Gardner has been writing scientific journal articles since 1998. Imagine a crab with legs that can stretch about 12 feet across! It has the largest leg span of any arthropod. Females tend to have wider, although slightly smaller, abdomens than males. However, "the development of a spine at the posterior angle of the supraocular eave, and the presence of intercalated spine and antennulary septum seem to attribute a rather high position to this genus." William Riebel (author), University of Michigan-Ann Arbor, Phil Myers (editor), University of Michigan-Ann Arbor, Renee Mulcrone (editor), Special Projects. 's' : ''}}. Sakai, K. 2010. The Japanese giant spider crabs will only live in the North Pacific Ocean, in the waters that border the Japanese islands of Konshu and Kyushu. These crabs primarily live in temperate waters of the Pacific Ocean near Japan. Detritus is the result of the activity of decomposers (organisms that decompose organic material). It also sometimes acts as a scavenger consuming dead animals. This giant ornamental crab adorns the spider crab with its algae and has sponges to enhance its camouflage to hide from predators such as fish and octopus. at And this crab can weigh up to 19 kilograms. Habitat. There are no known adverse effects of Macrocheira kaempferi on humans. They like to inhabit vents and holes in the deeper parts of the ocean. To further the illusion, a spider crab will adorn its shell with sponges and other animals. This large circular crab lives along the east Atlantic Ocean, from the North Sea to North Africa as well as in the Mediterranean Sea. Today I want to write about the longest crabs in the world, the Japanese spider crabs. To learn more, visit our Earning Credit Page. Crabs walk and swim sideways, however not all. Where Japanese Spider Crabs Live: Quiz & Worksheet for Kids, Over 83,000 lessons in all major subjects, {{courseNav.course.mDynamicIntFields.lessonCount}}, Japanese Spider Crab Facts: Lesson for Kids, Biological and Biomedical Unable to swim, the Japanese Spider Crab spends most of its time roaming the seashore, foraging for food. Japanese spider crabs are usually discovered off the southern shorelines of the Japanese island of Honsh, from Tokyo Bay to Kagoshima Prefecture. This dislodges the cuticle, and allows it to wriggle out by twisting and pulling until it frees itself. [17] The specific epithet commemorates Engelbert Kaempfer, a German naturalist who lived in Japan from 1690 to 1692 and wrote about the country's natural history. (Clark and Webber, 1991; Okamoto, 1991; Okamoto, 1993; Okamoto, 2001; Okamoto, 2003), The optimal rearing temperature for all larval stages is between 15-18 degrees Celsius, while the survival temperature is 11-20 degrees Celsius.