At present, the artificial pigment sunset yellow is widely used in infected fish, which is basically harmless to human body, but long-term excessive consumption will definitely cause certain harm to human body. The main method is to mix these pigments with water according to a certain proportion and put them in a water tank, and then put the domestic yellow croaker in the water tank for a few minutes.

Another reason is that the body color of fish will change with the change of environment, because the pigment cells on its body will aggregate and disperse, and so will the yellow croaker. The difference is that you can also put it in water and see if the water is dyed.