A collaboration to make marine biodiversity data more accessible Adam Obaza, WCR Protected Resources Division, NOAA In 2000, scientists began a ten-year effort to produce the most comprehensive inventory of known marine life ever compiled and created a catalog as a basis for future research. The Census of Marine Life involved over 80 nations, 2,700 scientists, and 540 expeditions. During this decade of discovery, Census scientists discovered new species, habitats, and connections.