Success of aquaculture depends on healthy cultured stock. A disease-free healthy stock can be maintained by feeding live food to the cultured stock. Live food organisms contain all the nutrients such as essential proteins, lipids, carbohydrates, vitamins, minerals, amino acids and fatty acids and hence are commonly known as “living capsules of nutrition”. Providing appropriate live food at proper time play a major role in achieving maximum growth and survival of the young ones of finfish and shellfish. It is obviously agreed that the production of live food organisms continues to be a very important first step in intensification of aquaculture, both horizontally as well as vertically. Rotifers are popularly called as wheel animalcules. They are an important group of live food organisms for use in aqua hatcheries. Aquaculture of all rotifers, serve as an ideal starter diet for early larval stages of many fish and prawn species in marine as well as freshwater species of the genus Brachionus (Brachionidae: Rotifera) are well represented in different water bodies worldwide. There are about 2,500 species of rotifers have been known from global freshwater, brackish water, and seawater. B. plicatilis is the species used most commonly to feed fish larvae in hatcheries around the world.