First, the subject classification is different
1, hairy crabs
Hairy crabs are a kind of river crabs, whose scientific name is Eriocheir sinensis. It belongs to the genus Eriocheir, Eriocheir sinensis and Eriocheir sinensis.
2. Flower crab
The flower crab is named for its patterned shell. Flower crab sometimes refers to orchid crab (male individual of Portunus pelagicus), belonging to Decapoda, Portunus, Portunus and Portunus pelagicus.
Second, the morphological characteristics are different
1, hairy crabs
The head and breastplate are square in shape, with fine particles on the edge. The front part is narrower than the back part, and the back part is bulging. There are six protrusions in the front, the former two are larger and the latter four are smaller, and the middle two are smaller but not obvious. Each protrusion has fine particles, and the forehead is divided into four teeth, with sharp particles at the tooth edge, sharp particles near the middle of the eye socket edge, thick claw feet, and a odontoid process near the end of the long segment back edge. The inside and outside of the male metacarpal and phalangeal base halves are densely villous, while the female villi are only inserted on the outside, and the inside is hairless. ?
2. Flower crab
The head breastplate is about twice as wide as the head breastplate, spindle-shaped, with rough particles on the surface. The female particles are more prominent than the male ones, and the claw feet are different in left and right sizes, slender, and the male claw feet are about four times as long as the head breastplate, with patterns on the surface. There are obvious differences in color between male and female. The males are mostly blue-green with light blue or white mottles except for the movable fingers and immobile fingers of the claw feet and the metacarpal joints (anterior joints) and phalanges (distal joints) of each step foot. The front part of the female head breastplate is dark green, and the back part is mottled with yellow and brown; The ventral surface of the anterior segment of the foot is light orange, extending to the base of the movable finger and the immovable finger, the front end of the two fingers is dark red, and the anterior segment and knuckles of the foot are light orange.
Third, the distribution of habitats is different
1, hairy crabs
Eriocheir sinensis is widely distributed in China, and the rivers leading to the sea are basically distributed, from Liaoning in the north to coastal provinces in Fujian in the south, especially in lakes and rivers on both sides of the middle and lower reaches of the Yangtze River. The habitat of Eriocheir sinensis is different due to ecological conditions, which can be divided into seclusion and burrowing. In the case of abundant bait, Eriocheir sinensis digs holes to live in caves to avoid enemy harm, but when the waters where Eriocheir sinensis lives are not suitable for Eriocheir sinensis to build caves, it looks for gravel or grass to live in seclusion. Especially in rivers, lakes, ditches and other waters with fresh water quality and abundant aquatic plants.
2. Flower crab
Eriocheir sinensis is a warm-water crab, which is mainly distributed in the coastal areas of Zhejiang, Fujian, Taiwan Province, Guangdong, Guangxi and Hainan Island in China. Inhabits on the seabed with a water depth of 10 to 30 meters in sand mud or rock bottom.
Baidu encyclopedia-Chinese mitten crab
Baidu Encyclopedia-Eriocheir sinensis
Baidu encyclopedia-flower crab