The cephalothorax has a very high dorsal back, with 5 longitudinal verrucous protrusions on the surface, soft hairs on the side, narrow forehead, concave anterior margin, divided into 2 teeth, and small eye sockets
The shape of the claw is asymmetrical, with thicker knuckles on the right and a tighter forehead when the claws are contracted. The foot is slender and smooth. The abdomen of the male is long striped, the third to fifth segments are healed, the segments are recognizable, the sixth segment is nearly rectangular, and the seventh segment is sharply triangular
This kind of steamed crab is also called yuanbao crab
The living environment is seawater, which generally inhabits sandy or silty bottoms at a depth of 30-100 meters
On spring mornings, they are often caught on the beaches of Cheung Chau Island in large quantities with long-arm crabs, strong grip crabs, eleven-spiny chestnut shell crabs, shrimp and mollusks
It also has medicinal properties and can be used for chest pain, so many people like to eat this crab