This report documents a training course that was held at the Research Institute for Mariculture, Bali, Indonesia in May 2003. The course covered both theoretical aspects of grouper husbandry via lectures and practical hands-on work in a grouper hatchery, including broodstock management, tank preparation egg collection, live feed production, health management, harvesting and transport and visits to commmercial grouper and milkfish hatcheries, grow-out facilities, markets and exporters.