Reef Life Survey (RLS) aims to improve biodiversity conservation and the sustainable management of marine resources through the production of high-quality survey information at spatial and temporal scales beyond those possible by scientific dive teams (which have to work with increasingly limited resources). It does this through the skills of experienced and motivated recreational SCUBA divers, as well as through partnerships with management agencies and a steering committee comprising managers, scientists and recreational divers (see RLS Steering Committee). RLS thus represents a dynamic cooperation between scientists, marine managers and recreational SCUBA divers, such that the skills and resources available for collecting, analysing, interpreting and effectively using broad-scale, sub-tidal biodiversity information are maximised.