Illumination poses the influence on shrimps' postnatal growth to a certain extent. Ultraviolet halogen lights or 12000K illumination tubes will be helpful for the formation of shell calcium. Namely, the whiteness parts of crystal red shrimps will be darkened. If the body color is transparent completely, it is impossible to resume to original whiteness in body colors. Once the whiteness pigment still stays on body surface, it is available to be whitened again.