The aim is to produce shrimp and other crustaceans in the most ecological way. This means with optimal utilisation of various resources: water, feed, raw materials, land surface. All losses (leaching, undigestible food, unnecessary transport of feed, nutrient rich effluents) should be minimized and treated in the following order: REDUCE, REUSE, RECYCLEReduction of losses: short time between production of feeds and utilisationOptimal utilisation: maximum digestibility, good feed quality, feed managementTreatment and recyling: nutrient recycling through in-pond biological treatment, uptake of nutrients by algae and bacteriaEffluent treatment: recuperation of nutrients by seaweeds, molluscs, omnivorous fishUtilisation of sludges for the production of sea vegetables. CreveTec will develop technology, alone or with partners, to optimize resources utilisation, step by step.