Calappa philargius (Linné) is an animal of the genus Crab in the family Crabaceae.
The crab prefers to eat snails, shellfish and small fish and shrimp carcasses, and its psittacule-shaped feet provide enough bite force to crush shells and eat shell meat. The Crab has a very strong digging skill, and once it encounters danger, it can dive into the sand in a very short time.
It is mainly distributed in China (Guangdong, Fujian, Hainan Island, Taiwan), Japan, South Korea, Indonesia, Singapore, Malay Islands, Persian Gulf, Red Sea and Indian Ocean.
The width of the cephalothorax is greater than the length. The surface is very long, with 5 longitudinal columns of wart-like protrusions, and the side mask is soft hairs. The forehead is narrow and divided into 2 teeth. The walls of the eye sockets are coarsely grained, and the dorsal margins of the eye sockets are each followed by a half-ring of purple markings. The third jaw foot has short hairs, the inner margin of the seat node has fine teeth, the end of the long segment is narrower than the base, and the outer limb can reach the end edge of the long segment. The anterior lateral margin has about 12 serrated teeth, and the posterior and posterior margins have a total of 15 triangular teeth. The claws are large, asymmetrical, the right claws are larger, both close to the face, the segments are short, the dorsal edge is divided into 4 blunt teeth with negative short hairs, the outer part of the wrist segment has a red spot, the dorsal margin of the palmar segment has 7 teeth, and the knuckles of the two claws are asymmetrical in shape. The steps are thin and short. The fifth segment of the male abdomen is square, and the sixth segment is longer than the width. The fifth segment of the female abdomen is broad and short, and the sixth segment is wider than long. The cephalothorax is 51.5 mm long and 77 mm wide.
The life of the steamed crab is relatively monotonous, basically squatting in one position during the day, and may not move for a day.
Honestly active during the day and at night, typical of nocturnal animals, but because there is no bottom sand, they will also crawl around during the day. However, if they are artificially buried with coral bones, they will immediately be quiet, which is determined by their nature of preferring to dive sand. (Yes, it's been another morning, and if you don't look at the tentacles moving, you can't say that it's alive~)