marine ecoregions
   (Biogeographic realm) Temperate Northern Atlantic
     2 (Biogeographic province) Northern European Seas
     3 (Biogeographic province) Lusitanian
     4 (Biogeographic province) Mediterranean Sea
     5 (Biogeographic province) Cold Temperate Northwest Atlantic
     6 (Biogeographic province) Warm Temperate Northwest Atlantic
     7 (Biogeographic province) Black Sea