Crayfish and prawns are good.

The reason why the colors of crayfish are different is not due to different species, but has a lot to do with water quality, environment and growth cycle. Generally, green shrimps live in rivers and lakes with good water quality, while red shrimps live in waters with poor water quality.

Furthermore, the ages of green shrimp and red shrimp are different. Green shrimp belongs to the growth stage of crayfish and will shed its shell every once in a while, so the color is cyan. Some red shrimps with darker colors are "old shrimps" that have passed their growth period and will no longer shed their shells, so their colors become darker and darker.

How to select crayfish:

1. Shrimp that are red, soft and loose are not fresh. Try not to eat them; spoiled shrimps are inedible; the lines on the backs of shrimps It should be picked out and not eaten.

2. The most important thing is to choose crayfish. The most delicious time for crayfish is from May to October. The meat is yellow and full of fat, and even the three sections on the big claws are made of elastic teeth and snow muscles stuffed from head to tail.

3. Check whether the crayfish is in clear or muddy water. If you look at the back, it is bright red and clean, which is acceptable. Then open it and look at the villi on its abdomen and the vellus hair on its claws. If it is white and neat, , basically raised in clean water.