This map shows North American marine ecoregions. Created by American, Canadian and Mexican ecologists, marine biologists, geographers and managers, and facilitated by the Commission for Environmental Cooperation (CEC), the map classifies North America’s oceans and coastal waters into 24 ecological regions according to oceanographic features and geographically distinct groups of species. The Level I marine ecoregions displayed here capture ecosystem differences at the largest scale by grouping together large water masses and currents, enclosed seas, and regions of coherent sea surface temperature or ice cover. The seaward boundaries of the marine ecoregions as mapped are approximate and do not represent the seaward boundaries of the ecoregions or an exact boundary of the Exclusive Economic Zones of the three countries.
Learn more about the Commission for Environmental Cooperation's Marine Ecoregions of North America Initiative at www.cec.org/marine