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Glossary
Dorsal fin: the unpaired fin found on the back of the body of fish, or the raised structure on the back of most cetaceans.
Plankton: aquatic organisms that drift with water movements; may be either phytoplankton (plants), or zooplankton (animals).
Cihar, J. (1991) A field guide in colour to freshwater fish.Silverdale Books, Leicester.
Tyler-Walters, H., (2003) Gasterosteus aculeatus. Three-spined stickleback. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. (January, 2003) http://www.marlin.ac.uk/species/Gasterosteusaculeatus.htm
Buczacki, S. (2002) Fauna Britannica.Hamlyn, London.