This study of the reproductive and population biology of three commercially valuable species of sea cucumbers was undertaken to support the development of a sustainable fishery for Micronesia.  The species Holthuria (Microthele) nobilis, Actinopyga mauritiana, and Thelenota ananas were chosen for their high market values and presence throughout the region.  The first year of this multi-year program included filed surveys, experiments on tagging techniques, determination of reproductive timing, and initial steps of larval rearing.  Year two of the research program concentrated on refinement of larval rearing techniques, continuation of the database on reproductive timing, and expansion into the areas of population biology and natural products chemistry.