Spirulina is one of the most favourite foods of herbivores food species like Malawi fish, Snails etc., Subsequently, Spirulina induces uniform growth and enhances growth rate. Spirulina also stimulates the immune system and increases the digestion rate and so the relieves the problem of swollen abdomen in fishes. Feeding Fishes with spirulina augments the brightness of colors owing to the carotene pigment of algae. Digested fats are converted to energy with the specific enzymes generated by the Spirulina foods and so is not stored as fats.