A blend of the 5 marine microalgae most commonly used by universities and hatcheries for their superior nutritional value for aquaculturing marine species of all kinds: Pavlova, Isochrysis, Thalassiosira weissflogii, Tetraselmis, Nannochloropsis, and Synechococcus. Super-nutritious food for filter feeders including corals, Tridacnid clams, scallops, feather dusters, tunicates and zooplankton. Particle size: 1-15 microns.