Reduce rate and body deformities, Depress the digestion; symptoms area unit like that of polygenic disease millitis in heat full-blood animals, Enlarge livers, Sikoki unwellness in carp like diabetic symptoms. Thyroid Hyperlasia caused by iodine deficiency. Dicalcium phosphate deficiency cause spinal curvature in carps. Nutritional fish diseases will be attributed to deficiency, excess or improper balance of elements gift within the food obtainable. Symptoms seem step by step once one or a lot of elements within the diet drop below the vital level of the body reserves.