Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Astra Plinius - celestial bodies
         Universe
           (Supercluster) Virgo-Hydra-Centaurus Supercluster
             (Supercluster) Virgo Supercluster
               (Cluster) Local Group
                 (Galaxy) Milky Way Galaxy veter.
                   (Spiral arm) Orion Arm
                     (Region) Local Bubble
                       Local Interstellar Cloud
                         (Planetary system) Solar System
                           (Planet-satellite system) Earth System
                             (Planet) Earth veter.
                               "spheres" (Earth)
                                 (Sphere) Hydrosphere (Earth) - layer of water
                                   (Drainage basin) Atlantic Ocean Basin
                                     (Drainage basin) American Mediterranean Sea Basin (America)
                                       (Drainage basin) Gulf of Mexico Basin
                                         0 (Bay) Gulf of Mexico
                                         1 (Drainage basin) Suwannee River Basin (United States: Florida: Dixie County)
                                         2.1.301834N0875213W (Bay) Bon Secour Bay (United States: Alabama: Baldwin County)
                                         2.2 (Drainage basin) Mobile Bay Basin (United States)
                                         2.3.301349N0880512W (Bay) Pelican Bay (United States: Alabama: Mobile County)
                                         3.1.0.301601N0883100W (Bay) Mississippi Sound (United States: Mississippi: Jackson County)
                                         3.1.1.302101N0881500W (Bay) Portersville Bay (United States: Alabama: Mobile County)
                                         3.1.2.302306N0882050W (Bay) Grand Bay (United States: Alabama: Mobile County)
                                         3.1.3.302042N0882546W (Bay) Point Aux Chenes Bay (United States: Mississippi: Jackson County)
                                         3.1.4.302103N0883605W (Bay) Pascagoula Bay (United States: Mississippi: Jackson County)
                                         3.1.5.302302N0884944W (Bay) Biloxi Bay (United States: Mississippi: Harrison County)
                                         3.1.6.302104N0891901W (Bay) Saint Louis Bay (United States: Mississippi: Hancock County)
                                         3.1.7.1.300232N0892554W (Bay) Blind Bay (United States: Louisiana: St. Bernard Parish)
                                         3.1.7.2.300231N0892405W (Lake) Kennedys Lagoon (United States: Louisiana: St. Bernard Parish)
                                         3.2.0.300141N0893703W (Bay) Lake Borgne (United States: Louisiana: St. Bernard Parish)
                                         3.2.1.301105N0892832W (Bay) Heron Bay (United States: Mississippi: Hancock County)
                                         3.2.2 (Drainage basin) Pearl River Basin (United States: Mississippi, Louisiana)
                                         3.2.3.301022N0893331W (Bay) Polecat Bend (United States: Louisiana: St. Tammany Parish)
                                         3.2.4.1.300736N0894352W (Lake) Lake Saint Catherine (United States: Louisiana: Orleans Parish)
                                         3.2.4.2 Drainage basin Lake Pontchartrain Basin (United States: Louisiana)
                                         3.2.5.300305N0894245W (Bay) Alligator Bend (United States: Louisiana: St. Bernard Parish)
                                         4 (Drainage basin) Mississippi River Basin (United States, Canada)
                                         5 (Drainage basin) Rio Grande Basin (United States, Mexico)