Micro algal culture is of fundamental importance in hatcheries of marine mollusks, shrimp and fish. A continuous, stable and reliable supply of
nutritionally adequate rotifers is the key to the flourishing culture of marine finfish in various parts of the world. Fish larvae are described with two or three types of organisms during the initial 10 - 30• days of exogenous feeding. These include rotifers of the species Brachionus rotundiformis and B. plicatilis and the brine shrimp, Artemia, nauplii
