The volume of water and density are managed to facilitate rapid growth and a high survival in the nursing phase. The ongrowing phase starts after the young are trained to feed on dead food, which is the critical period for aquaculture.The daily growth rate is 1.4 % in length and 3.4 % in weight, throughout the culture period of 210 days. The final size varies depending on the culture conditions, e.g. temperature, nutritional content of food, period of training, etc. Less than500 g