A method of rearing, cultivating or stocking crustacea, and crustacea reared, cultivated or stocked by the method. The method improves the survival rate and survival period of the crustacea. In the method, the crustacea are reared, cultivated or stocked within a deep sea water drawn from the sea at a depth of above 100 meters. The crustacea may be deep sea crustacea living in the sea at a depth of above 100 meters. The crustacea do not include crustacea living in the Sea of Japan at a depth of above 250 meters. The deep sea water may have a temperature of below 20.degree. C.