Look at the crab shell, look at the navel, look at the chelipeds, look at the vigor, look at the 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. Carefully study and refer to the "five look", you can put the quality of the crab from the many crabs to pick out.