marine ecoregions
   (Biogeographic realm) Southern Ocean
     (Biogeographic province) Subantarctic Islands
       212 (Marine ecoregion) Macquarie Island
       213 (Marine ecoregion) Heard and Macdonald Islands
       214 (Marine ecoregion) Kerguelen Islands
       215 (Marine ecoregion) Crozet Islands
       216 (Marine ecoregion) Prince Edward Islands
       217 (Marine ecoregion) Bouvet Island
       218 (Marine ecoregion) Peter the First Island