Look at the crab shell, navel, chelipeds, vigor, male and female.

1. Look at the crab shell. Where the back of the shell is black-green, with a bright light, are meat thick and strong; the back of the shell is yellow, most of the thinner.

2. Look at the navel. Navel convex out, a cream fat fat full; concave in, most of the fat body is not enough.

3. Look at the chelipeds. Where the chelipeds on the fluffy tufts, are chelipeds old healthy; and chelipeds without fluffy, the body is soft and weak.

4. Look at the vigor. The crab will be turned around, abdomen to the sky, can quickly turn back with the stinging foot flick, strong vigor, can be saved; can not be turned back, poor vitality, can not be stored for a long time.

5. Look at the male and female. Pick female crabs in August and September of the lunar calendar, and male crabs after September, because male and female crabs mature in the gonads of these two periods, and have the best flavor and nutrition. By carefully studying and referring to these "five looks", you will be able to select quality crabs from a large number of crabs.

Expanded Information:

Crabs spend most of their time searching for food, and are generally not picky eaters, as long as the chelipeds can get food can be eaten. Small fish and shrimp are their favorites, though some crabs eat seaweed, even dead animals and plants.

Crabs eat other animals, and other animals may also eat crabs, for example, humans eat crabs as a delicacy, and waterfowl eat crabs, and some fish like humans love to eat crab legs. When young and immature crabs swim in the sea, they may be preyed upon by other sea creatures, and therefore crabs have to lay a lot of eggs when they spawn to ensure the survival rate of the crabs.