What lives in the sea is seafood, and what is in the river is river food.

A small percentage of crabs grow and reproduce exclusively in fresh water, where they tend to live under rocks in mountain streams. There are also a few crabs such as the ground crab that can adapt to life on land, burrowing in moist mud holes and migrating down to the sea during breeding times. Most crabs are omnivorous. Some crabs are carnivorous, such as the pike crab, which preys on fish, shrimp and mollusks. A few crabs, such as the window crab, scrape or filter feed on algae and organic debris.

The Chinese mitten crab

Also known as river crab, hairy crab, clear water crab, hairy crab. With "green back, white belly, golden claws, yellow hair" distinctive features, there are four frontal teeth pointed, the inner frontal teeth between the notch is deep, was "U" or "V" type.

Expanded Information

Buying Tips

Common seawater crabs are pike crabs, snow crabs, blue crabs, etc., of which snow crabs are basically dead from the water after capture, and pike crabs can be artificially cultivated. Pike crabs, snow crabs intake of food quality and growth environment is better, after death can be eaten, picking to choose fresh: back shell is greenish-black, with luster, umbilical cord full, belly white freshness is higher.

The green crab lives in shallow coastal waters and estuarine mud and sandy bottoms, carnivorous, and sometimes feeds on decaying small animals. Once dead, green crab gastrointestinal tract may have toxins and spread to the muscle, so dead green crab should not be eaten. It is best to put green crabs in clean, lightly salted water for temporary purification after purchase to help clean the crab's digestive organs.

Reference? Baidu Encyclopedia-Crabs