Crayfish is also called Procambarus clarkii, red crayfish and freshwater crayfish. Shaped like a shrimp with a hard shell The adult is about 5.6~ 1 1.9 cm long, dark red, with nearly black carapace and wedge-shaped stripes on the ventral back. Young shrimps are evenly gray, sometimes with black ripples.

Will crayfish die in a day?

Crayfish usually don't die in a day. Crayfish can survive for 2 to 3 days if properly preserved. Lobsters have a great demand for oxygen in water, so they can't survive in water. Very little water or no water can live for 2 to 3 days, and a small amount of water is only used to keep lobsters moist.

Nutritional value of crayfish

1. According to the composition of protein, the protein content of lobster is 18.9%, which is higher than that of most freshwater and seawater fish and shrimp, and the amino acid composition is better than that of meat. It contains eight kinds of essential amino acids which are necessary for human body but cannot be synthesized or insufficient in vivo, including not only isoleucine, tryptophan, lysine, phenylalanine, valine and threonine, but also arginine which is very little in vertebrates.

2. The fat content of lobster is only 0.2%, which is not only far lower than that of livestock and poultry, but also far lower than that of green shrimp and prawn. Moreover, its fat is mostly composed of unsaturated fatty acids necessary for human body, which is easily digested and absorbed by human body and has the function of preventing cholesterol from accumulating in the body.

3. Lobster, like other aquatic products, contains essential mineral components, among which calcium, sodium, potassium, magnesium and phosphorus are more abundant, and iron, sulfur and copper are more important. The total mineral content in lobster is about 65438 0.6%, among which the content of calcium, phosphorus, sodium and iron is higher than that of common livestock and poultry meat and prawns. Therefore, regular consumption of lobster meat can maintain the excitement of nerves and muscles.

The choice of crayfish

Crayfish is the best in May 5- 10/0. Its whole body is yellow, full of meat and fat, and even the three joints on its big claws are full of elastic teeth and snow muscles from beginning to end. See if the crayfish is clear water or muddy water, and its back is bright red and clean. Then look at the fluff on its abdomen and the hair on its claws. If it is white and neat, it is basically raised with clear water.