Equal in significance to the production of power by OTEC, mariculture would be one of the key export industries of the Aquarian marine colony and also one of its most sophisticated. Relying on a broad spectrum of techniques, most Aquarian mariculture would be a direct companion to OTEC, exploiting its nutrient-rich discharge water as the basis of a Polyspecies Mariculture system that needs little or no input of feedstocks while producing a large diversity of food products. Algaeculture would be the foundation of this system, generating by itself both a bulk food product and a feedstock for various industrial uses in addition to being the basic feedstock for the rest of the mariculture system.