NOVELTY - Producing selective hydrocarbons from algae, involves obtaining a feed material of water-saturated algae, treating the algae with water at subcritical temperature for predetermined period of time in a reactor, collecting an aqueous liquid phase product from the reactor, and separating the hydrocarbons from the aqueous liquid phase product.    USE - The method is useful for producing selective hydrocarbons from algae, and producing hydrocarbons, and organic fertilizer from one feed material (all claimed). The feed material is used for producing hydrocarbon fuel.    ADVANTAGE - The method reduces production of by-products, is cost-effective and requires less labor.    DETAILED DESCRIPTION - Method of producing selective hydrocarbons from algae, involves (a) obtaining a feed material of water-saturated algae, treating the algae with water at subcritical temperature for predetermined period of time in a reactor, collecting an aqueous liquid phase product from the reactor, and separating the hydrocarbons from the aqueous liquid phase product, or (b) extracting algaenan from algae, treating the algaenan with water at a subcritical temperature for a predetermined period of time in the reactor, collecting an aqueous liquid phase product from the reactor, and separating the hydrocarbons from the aqueous liquid phase product. INDEPENDENT CLAIMS are included for the following:    (1) feed material for producing selective hydrocarbons, comprising (a) genetically modified algae having algaenan, or (b) algaenan extracted from algae and subsequently chemically modified; and    (2) method of producing hydrocarbons and organic fertilizer from one feed material, involves treating the water-saturated algae having algaenan with water at a subcritical temperature for a predetermined period of time in the reactor, collecting an aqueous liquid phase product from the reactor, separating the hydrocarbons from the aqueous liquid phase product, and collecting liquid remaining from the aqueous liquid phase product as organic fertilizer.