Nannochloropsis Salina Powder is a kind of unicellular marine microalgae, belonging to Chlorophyta, Chlorophyceae, Tetrasporales, Coccomgxaceae. With thin cell wall, its cell is round or ovoid, and the diameter is 2-4μm. Nannochloropsis multiply fast and is rich in nutrition; therefore it is widely used in aquaculture, and is an ideal bait for breeding arcidae, shrimp, crab and rotifer.  Except 20% carbohydrates, 40% proteins, Nannochloropsis powder also contains at least 30% lipids, of which most are unsaturated fatty acid, especially the content of EPA taking 30% of fatty acids and 5% of dry weight. By the way of providing nutrition and improving water quality, Nannochloropsis can effectively promote the growth of rotifer, shrimp and crab etc, and can obviously raise hatchability and survival rate, so it is excellent bait for aquaculture.   1. Nannochloropsis Powder can be used as raw material to add in wine, fruit juice, bread, cake, cookies, candy and other foods; 2.Nannochloropsis Powder can be used as food additives, not only improve the color, fragrance and taste, but improve the nutritional value of food;   Since Nannochloropsis is rich in nutrition and unsaturated fatty acids, as bait it has good effects for aquaculture, not onlyproviding enough nutrition for shrimp, crab and rotifer, but also improving aquatic environment and purifying water quality, inhibiting the growth of other harmful algae. Nannochloropsis is a genus of alga within the heterokont line of eukaryotes, that is being investigated for biofuel production. One marine Nannochloropsis species has been shown to be suitable for algal biofuel production due to its ease of growth and high oil content (28.7% of dry weight), mainly unsaturated fatty acids and a significant percentage of palmitic acid. It also contains enough unsaturated fatty acid linolenic acid and polyunsaturated acid (>4 double bonds) for a quality biodiesel