The scientific name of the blue crab is the saw-margined blue crab, commonly known as the gazami crab, Samen blue crab; the dorsal armor is transversely elliptic, and the sides are pointed. The dorsal carapace is transversely oval with pointed sides. The surface of the carapace is smooth, the forehead has four equal-sized teeth, the anterior lateral margin containing the outer teeth of the eye sockets*** has nine large teeth, and the fourth foot is flattened and specializes in paddle-like swimming feet, which is suitable for swimming.

Chelicerae smooth, asymmetric, right foot slightly larger than left; palpal articulation swollen and smooth, dorsal surface with two granular ridges, each with a spine at its end. The first three pairs of pedipalps are edentulous, and the anterior and posterior margins of the phalanges are bristly with short hairs.

The green crab is a crab species living along the coast of the warm sea area, widely distributed in the Indo-West Pacific region, including Japan, Ryukyu, mainland China, Taiwan, Southeast Asia, India, East Africa, South Africa, Australia and other places. It mostly inhabits mud marshes with slightly lower salinity such as estuaries, inland bays and mangroves.

In addition to overwintering and spawning in the deeper sea area, basically inhabits the intertidal zone of estuaries and inland bays. Where the coastal tide is open, the tide difference is large mud flats, mud sandy beaches and other places, especially in the mangrove zone, are inhabited by green crabs.

Expanded Information:

Life Habits

Green crabs are carnivorous animals in the In the natural environment, it feeds mainly on mollusks such as razor clams, arkshells, oysters, green clams, clams, small shrimps and crabs, barnacles, etc., and also eats animal carcasses and a small amount of algae such as hedges, etc. It eats each other when it's hungry, especially when it's molting.

Feeding mode: sometimes take the initiative to take the way, in the high tide from the mud hole crawling out, with the tide swim to shallow areas, to chelipeds to prey on the benthic invertebrates; sometimes waiting for rabbits, that is, guarded in the mud hole, waiting for the tide to bring prey.

The green crab is also a widely saline marine crab, its breeding of suitable salinity of 7 ‰ ~ 33 ‰, the optimum is 10 ‰ ~ 20 ‰, the temperature range of 6 ℃ ~ 35 ℃, the optimal growth of the water temperature of 18 ℃ ~ 25 ℃, this time, the green crab's activity is strong, a strong appetite.