1. Shrimp fry size: When buying crayfish fry, you should buy shrimps with the same size and a body length of more than 3.5㎝ to ensure that they are at the same development stage.

2, the color of shrimp fry: high-quality crayfish fry are generally pure in color and consistent in body color.

3. Handle of shrimp seedlings: shrimp seedlings with rough handle are easier to survive, and the best weight is between 10- 15g each.

4. Mobility of shrimp fry: You can put the selected crayfish fry in a cage to see if they will crawl around quickly and whether they are agile.

Nowadays, lobsters are basically bought from crayfish breeding bases, which are more expensive than wild crayfish seedlings, but they grow fast, have strong physique, neat fry specifications and high survival rate. Therefore, it is recommended to buy base seedlings instead of wild seedlings, which not only has a low survival rate, but also is difficult to take care of during the breeding process and is prone to illness.