This mainly depends on the size of the crayfish. If it is a little bigger, it is estimated that there are about 10 a catty. If it's smaller, it's estimated that it's only about 20 kilograms, so it's uncertain.

Crayfish are also known as Procambarus clarkii, red crayfish and freshwater crayfish. Shaped like a shrimp with a hard shell. It is dark red, the shell part is nearly black, and there is a wedge-shaped stripe on the back of the abdomen. Young shrimps are uniform gray, sometimes with black ripples.

Crayfish usually comes to market in March every year. The peak of crayfish listing is in mid-March, April, May, June, July and August every year, and it begins to fall into the market after autumn in September.

Normally, after the sting, the crayfish will slowly go out for food, which can be caught completely, but the crayfish is not active at this time, and the quantity will be less. Those who like to eat crayfish can wait a little longer. May and June are the best seasons for crayfish every year, but the price will increase accordingly.

Pick fresh crayfish.

1, look at the back: the older the crayfish, the more toxins and bacteria there are, so you must choose the newly grown and mature lobsters. The shell of healthy crayfish is full of elasticity and bright red color; It must be an old lobster with a black back and a hard shell.

2, look at the abdomen: crayfish are mostly artificially raised, and the hairs on the claws of crayfish growing in clear water are clean and tidy.

3. Look at shrimp tongs: Some unscrupulous merchants will use shrimp washing powder for cleaning in order to make crayfish look shiny and clean. Although the crayfish treated in this way looks clean, the shrimp tongs will easily fall off due to corrosion. Be careful if the shrimp tongs for crayfish are extremely fragile, or if the number of shrimp tongs for a finished crayfish is small.

4, look at the shrimp belly: it is not enough to look clean on the smooth surface. Crayfish has something similar to "intestines", which must be removed before doing it; If you buy a prepared crayfish, you should also pay attention to whether the tail is curled. If the tail is straight, it means that the crayfish itself is not fresh.