The body color of shrimp at seedling stage is deep.

The deep body color of prawns at seedling stage is caused by environmental factors such as hypoxia, malnutrition and poor water quality in ponds.

Penaeus monodon is a kind of benthic organism with strong adaptability. It mainly inhabits the coast and coastal areas at seedling stage and needs to adapt to the environment with insufficient nutrition and oxygen. However, in the process of culture, the environmental conditions will be unstable, which will lead to the darker color of shrimp seedlings. First of all, hypoxia is one of the main reasons for the color darkening of shrimp at seedling stage. Shrimp seedlings need a lot of oxygen, and lack of oxygen in water can easily lead to the accumulation of metabolites and non-metabolites in shrimp seedlings, which will lead to dark body color. Secondly, malnutrition is also one of the reasons for the deep color of shrimp seedlings. In the process of culture, if the type and dosage of shrimp fry bait are improper, or the culture density is too high, it will also lead to loss of appetite and malnutrition of shrimp fry, which will lead to deep body color change.

In addition, the poor water quality in the pond is also one of the reasons for the deep color of shrimp seedlings. For example, too much algae, plankton and waste in the water will increase the burden of shrimp seedlings, reduce their adaptability and cause the deep color.