China called it a crab because the furrow on its back armor resembled the face of a general of Shu State in the Three Kingdoms period in ancient China-a lying silkworm with an eyebrow and a phoenix eye.
The name of this small sea crab in Japan is Pingjia Crab. Why do Japanese people call it flat-toed crab? Here's another story. Hiraga was originally a famous samurai family in Japan. 1 185 fought against the Genji family in Tanpu, an otaku, and was defeated by Genji, so the Pingjia warriors were buried in the sea. The Japanese believe that this crab is the embodiment of the ghost of the flat-armored warrior, because the groove on its back armor looks like an angry man's face: the eyes are erect and the mouth is open, which seems to have a lot of hatred, and because it lives in the inner sea of otters, the Japanese call it the flat-armored crab. The legend about the flat-shelled crab is still widely circulated in Japan, even in Japanese natural science books, it is called flat-shelled crab.
1985 coincides with the 800th anniversary of the fiasco of Pingjia samurai Tanzhipu. Japan's Asahi Shimbun also published some reports about this crab and different views on it. The content of the debate is why flat-shelled crabs are particularly abundant in the inland sea. Carl Seger, an American, believes that after catching this crab, the Japanese fishermen thought it was the ghost of an armored warrior, so they all put it back into the sea, thus promoting the mass reproduction of this crab. However, Dr. Sakai Heng of Yokohama University in Japan believes that this statement cannot be established, because flat-shelled crabs don't just live in Tampu. The reason why this kind of crabs can multiply in large numbers is mainly because they don't have much meat at all and can't eat at all, not because they are immortal. Obviously, Sakai's statement is reasonable.