(4) http://en.wikipedia.org/wiki/Image:Oceanic_basin.svg. GNU-FDL.(5) http://en.wikipedia.org/wiki/File:Gulf_Offshore_Platform.jpg. CC-BY 3.0.(6) http://upload.wikimedia.org/wikipedia/commons/c/cc/Ocean_surface_
currents.jpg. GNU-FDL.(7) wiki/Bathyscaphe_Trieste. GNU-FDL.(8) NOAA.http://en.wikipedia.org/wiki/File:ALVIN_submersible.jpg. Public
Domain.(9) http://en.wikipedia.org/wiki/Upwelling#Equatorial_upwelling. GNU-FDL.(10) Erik Ong.. CC-BY-SA.
(11) http://en.wikipedia.org/wiki/File:Volcano_q.jpg. Public Domain.
(12) http://en.wikipedia.org/wiki/Kelp. GNU-FDL.
(13) http://en.wikipedia.org/wiki/Chondrichthyes. GNU-FDL.
(14) Geoff Ruth.. CC-BY-SA.
(15) http://en.wikipedia.org/wiki/File:Spotteddolphin1.jpg. GNU-FDL.
(16) http://en.wikipedia.org/wiki/Marine_biology. GNU-FDL.
(17) Sofwathulla Mohamed.http://commons.wikimedia.org/wiki/File:
2004_Indian_Ocean_earthquake_Maldives_tsunami_wave.jpg. Public Domain.
(18) wiki/Image:Oceanic_divisions.svg. GNU-FDL.
(19) http://en.wikipedia.org/wiki/Coriolis_effect. GNU-FDL.
(20) http://en.wikipedia.org/wiki/Thermohaline_circulation. GNU-FDL.
(21) http://en.wikipedia.org/wiki/Rockhopper_Penguin. GNU-FDL.
(22) Erik Ong.. CC-BY-SA.
(23) http://en.wikipedia.org/wiki/File:Plankton_collage.jpg. GNU-FDL.
(24) CK-12 Foundation.http://en.wikipedia.org/wiki/Pangaea. GNU-FDL.
(25) http://en.wikipedia.org/wiki/Image:HMCS_Windsor_SSK_877.jpg. GNU-FDL.
(26) http://en.wikipedia.org/wiki/Tidal_range. GNU-FDL.
(27) http://en.wikipedia.org/wiki/Sea_turtle. GNU-FDL.