12 marine regions in the world have been identified and sub-divided into 62 marine provinces, which in turn include 232 marine ecoregions. The marine regions are: Arctic, temperate North Atlantic, temperate North Pacific, tropical Atlantic, Western Indo-Pacific, Central Indo-Pacific, Eastern Indo-Pacific, tropical Eastern Pacific, temperate South America, temperate South Africa, temperate Australasia and Southern Ocean. WWF 
Marine regions of Mexico include; temperate North Pacific, tropical Eastern Pacific, temperate North Atlantic and tropical Atlantic. Of the 232 marine ecoregions, 11 are in Mexico.
 |
| Number |
Pacific Ecoregion |
Number |
Atlantic Ecoregion |
58 |
Northern California |
43 |
Northern Gulf of Mexico |
59 |
Coast of Southern California |
68 |
Western Caribbean |
60 |
Sea of Cortez |
69 |
Southern Gulf of Mexico |
61 |
Magdalena Transition |
|
164 |
Revillagigedos |
165 |
Clipperton |
166 |
Mexican tropical Pacific |
167 |
Chiapas–Nicaragua |
| |
|
