How does this huge, slender crab have to be shelled?

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Spider crab is the world's largest arthropod, they live in the deep sea near Japan, has a living fossil title. How does a large, slender crab like this be shelled? Kanagawa-ken New River Island Aquarium continuous filming for 6 hours, a complete record of a spider crab out of the "old skin" process ...

This video has been uploaded for a long time and has recently been reported by the Japanese website RocketNews24, causing the topic. The giant spider crab is going to be shelled, but the butt has cracked a seam, and the fresh red shell is too large to be exposed; then it's like taking off clothes, 10 crab feet stretching forward, the whole body from the rear "xiu" drilled out.

The Japanese spider crab (Maja japonica) is more than 50 cm wide and the crab's foot stretches up to 4 meters. Their longevity is much better than the average crab, averaging 80 years or more, but the shell is relatively slow, about 2-3 years before taking off the shell. Spider crabs because of the claws sharp, hard, character and very violent, also known as the "killer crab."

See how the Giant spider crab is shelled.