References

Animals, a visual encyclopedia. Smithsonian. 2012. Pp. 78-81.

World of animals Magazine. Imagine publishing. Pp. 44,45.

Stone, Sheean-Stone. Otters. IUCN, 1992.

Mara, Wil. Otters. Marshall Cavendish, 2007.

Kruuk, Hans. Otters: ecology, behaviour and conservation: ecology, behaviour and conservation. Oxford University Press, 2006.

http://www.defenders.org/sea-otter/basic-facts

http://animals.nationalgeographic.com/animals/mammals/sea-otter/

http://seaworld.org/en/animal-info/animal-infobooks/otters/

http://www.npca.org/protecting-our-parks/wildlife_facts/seaotter.html

http://news.discovery.com/animals/the-other-side-of-otters.htm

http://www.otter.org/