1, the newly hatched seedlings are in the stage of not leaving the mother. The seedlings at this stage do not need any external bait supply, they rely on the yolk carried by their fertilized eggs after hatching to provide nutrition, and do not need to take bait from the outside;

2. With the growth and development of shrimp seedlings reaching about 1-2 cm, the seedlings will live independently from the mother and need to rely on their own predation to obtain energy. At present, it is difficult for shrimp seedlings to catch large aquatic animals or feed on aquatic plants, and they can only rely on filtering organic debris, phytoplankton, worms and so on. In water, small and medium-sized plankton such as cladocera or copepod are in water.