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national Geographic, 1996-2015 National Geographic Society,2015-2019 National Geographic Partners, LLC. unknown. Blue Whale. [Online]. [1^st November, 2019]. Available from: https://www.nationalgeographic.com/animals/mammals/b/blue-whale/

national Geographic, 1996-2015 National Geographic Society,2015-2019 National Geographic Partners, LLC. unknown. Ocean acidification, explained. [Online]. [1^st November, 2019]. Available from: https://www.nationalgeographic.com/environment/oceans/critical-issues-ocean-acidification/

national Geographic, 1996-2015 National Geographic Society,2015-2019 National Geographic Partners, LLC. unknown. Ocean warming, explained. [Online]. [1^st November, 2019]. Available from: https://www.nationalgeographic.com/environment/oceans/critical-issues-sea-temperature-rise/

national Geographic, 1996-2015 National Geographic Society,2015-2019 National Geographic Partners, LLC. unknown. Oceans. [Online]. [1^st November, 2019]. Available from: https://www.nationalgeographic.com/environment/oceans/

national Geographic, 1996-2015 National Geographic Society,2015-2019 National Geographic Partners, LLC. unknown. Ocean species are disappearing faster than those on land. [Online]. [1^st November, 2019]. Available from: https://www.nationalgeographic.com/environment/2019/04/ocean-species-disappear-faster-climate-change-impacts-cold-blooded-animals-harder/

Scientific American. Unknow. What do we know about the origin of the earth's oceans? Is it more likely that they derive from icy comets that struck the young earth or from material released from the earth's interior during volcanic activity?. [Online]. [1^st November, 2019]. Available from: https://www.scientificamerican.com/article/what-do-we-know-about-the-1997-07-15/

Radio

BBC. 2017. Blue Planet II. [Online]. [1^st November, 2019]. Available from: https://www.bbcearth.com/blueplanet2/#_

Image

HIROYA MINAKUCHI, MINDEN PICTURES/NAT GEO IMAGE COLLECTION. Unknown. [Online]. [1^st November, 2019]. Available from: https://www.nationalgeographic.com/animals/mammals/b/blue-whale/#/blue-whale_01.jpg

BRIAN SKERRY, NAT GEO IMAGE COLLECTION. Unknown. [Online]. [1^st November, 2019]. Available from: https://www.nationalgeographic.com/environment/2019/04/ocean-species-disappear-faster-climate-change-impacts-cold-blooded-animals-harder/#/01-pacific-ocean-reference.jpg

CASSIE JENSEN, NATIONAL GEOGRAPHIC YOUR SHOT. Unknown. [Online]. [1^st November, 2019]. Available from: https://www.nationalgeographic.com/environment/2019/04/ocean-species-disappear-faster-climate-change-impacts-cold-blooded-animals-harder/#/01-pacific-ocean-reference.jpg

DAVID GRIFFIN, NAT GEO IMAGE COLLECTION. Unknown. [Online]. [1^st November, 2019]. Available from: https://www.nationalgeographic.com/environment/oceans/reference/atlantic-ocean/#/01_atlanticocean_nationalgeographic_2717418.jpg

ARTERRA PICTURE LIBRARY, ALAMY STOCK PHOTO. Unknown. [Online]. [1^st November, 2019]. Available from: https://www.nationalgeographic.com/environment/oceans/reference/arctic-ocean/#/01_arctic_ocean_kxwd6b.jpg

DAVID DOUBILET, NAT GEO IMAGE COLLECTION. Unknown. [Online]. [1^st November, 2019]. Available from: https://www.nationalgeographic.com/environment/oceans/reference/arctic-ocean/#/01_arctic_ocean_kxwd6b.jpg

JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK. Unknown. [Online]. [1^st November, 2019]. Available from: https://www.nationalgeographic.com/animals/invertebrates/group/corals/#/_corals_07.jpg

LUIS MARDEN, NATIONAL GEOGRAPHIC. Unknown. [Online]. [20^th December, 2019]. Available from: https://www.nationalgeographic.com/photography/photo-of-the-day/2019/12/cousteau-diving-indian-ocean/

W. H. LONGELY AND CHARLES MARTIN, NATIONAL GEOGRAPHIC. Unknown. [Online]. [20^th December, 2019]. Available from: https://www.nationalgeographic.com/photography/photo-of-the-day/2019/12/fish-color-autochrome-underwater/

BRIAN SKERRY, NATIONAL GEOGRAPHIC. Unknown. [Online]. [20^th December, 2019]. Available from: https://www.nationalgeographic.com/photography/photo-of-the-day/2019/11/bahamas-dolphins-ocean-swimming/

ENRIC SALA, NATIONAL GEOGRAPHIC. Unknown. [Online]. [20^th December, 2019]. Available from: https://www.nationalgeographic.com/photography/photo-of-the-day/2019/11/giant-kelp-forests/

ESTHER HORVATH, NATIONAL GEOGRAPHIC YOUR SHOT. Unknown. [Online]. [20^th December, 2019]. Available from: https://www.nationalgeographic.com/photography/photo-of-the-day/2019/10/arctic-ocean-heart-pond/

DAVID EDGAR, NATIONAL GEOGRAPHIC YOUR SHOT. Unknown. [Online]. [20^th December, 2019]. Available from: https://www.nationalgeographic.com/photography/photo-of-the-day/2019/10/humpback-whale-pacific-tonga/

BRENNA SHOULTZ, NATIONAL GEOGRAPHIC YOUR SHOT. Unknown. [Online]. [20^th December, 2019]. Available from: https://www.nationalgeographic.com/photography/photo-of-the-day/2019/09/greenland-sailing-iceberg-ocean/