Subseries contains correspondence, research data, and conference minutes and notes related to the Census of Marine Life subcommittee, Arctic Ocean Diversity (ArcOD). The Arctic Ocean Diversity project was designed to catalogue animal species and microbes found in the Arctic region—on, in and under the sea ice, in deep basins and along the continental shelves. The project was led by American scientists Bodil Bluhm, Rolf Gradinger and Russ Hopcroft, who sought to document the northward extensions of ranges of Arctic fish and invertebrates.