TECHNOLOGY FOCUS - BIOLOGY - Preferred Components: The planktivorious organism is a planktivorious fish and the extracted lipids are fish lipids. The extracted fish lipids are polished to make biofuel, or omega 3 fatty acids. Preferred Method: The method further comprises providing one or more species of algae to the target site. The micronutrients are provided to control the growth of a population of algae at the target site.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The limiting nutrient is carbon, nitrogen, phosphorus, potassium, silicon or iron. The micronutrients are inorganic salts comprising silicon, iron, calcium, zinc, manganese, boron, molybdenum, magnesium, vanadium, strontium, aluminum, rubidium, lithium, copper, cobalt, bromine, iodine or selenium.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The means for generating or controlling the upwelled water in the body of water comprises an open-cycle OTEC system. The system further comprises: one or more enclosures containing the fish; and means to monitor and regulate the environment of the target site and/or the enclosures. The means to monitor and regulate the environment of a target site and/or the enclosures is means to monitor and/or adjust the pH, salinity, dissolved oxygen, temperature, turbidity, and concentrations of nutrients to the target site and/or the enclosures.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The omega 3 fatty acids are eicosahexaenoic acid, docosahexaenoic acid, and their derivatives. The body of water is a target site. Preferred Method: The target site is selected to provide an upwelling of a nutrient-rich source of water. The cold water pipe of the OTEC system is varied by depth and/or position to access a particular nutrient profile for the target site. The nutrient-rich source of water provides a limiting nutrient. The method further comprises providing micronutrients to the target site. The micronutrients are provided to prevent or overcome nutrient limitation at the target site. EXAMPLE - None given.