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Commerson's dolphin
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==Behavior== Commerson's dolphin is very active. It is often seen swimming rapidly on the surface and leaping from the water. It also spins and twists as it swims and may surf on breaking waves when very close to the shore. It will bow-ride and swim behind fast-moving boats. It is also known to swim upside-down, which is thought to improve the visibility of its prey. This dolphin feeds on a mix of coastal and [[pelagic fish]] and [[squid]]. Those in the South American subpopulation supplement their diets with [[crustacean]]s.<ref>{{Cite journal |last1=Kastelein |first1=R. A. |last2=McBain |first2=J. |last3=Neurohr |first3=B. |date=1993 |title=Information on the biology of Commerson's dolphins (''Cephalorhynchus commersonii'') |journal=Aquatic Mammals |volume=19 |issue=1 |pages=13–19 |url=https://core.ac.uk/download/pdf/29322129.pdf#page=193}}</ref><ref>{{Cite book |last1=Brownell |first1=Robert L. |last2=Donovan |first2=Gregory P. |title=Biology of the genus Cephalorhynchus |date=1988 |publisher=International Whaling Commission |isbn=0-906975-17-4 |oclc=19253432}}</ref><ref>{{Cite journal |last1=Kastelein |first1=R. |last2=McBain |first2=J. |last3=Neurohr |first3=B. |last4=Mohri |first4=M. |last5=Sayo |first5=S. |last6=Wakabayaski |first6=I. |last7=Wiepkema |first7=P.R. |date=1993 |title=The food consumption of Commerson's dolphins (''Cephalorhynchus commersonii'') |journal=Aquatic Mammals |volume=19 |issue=2 |pages=99–121 |url=https://www.researchgate.net/publication/40183835}}</ref> Individuals have been recorded as entering the Santa Cruz River to forage there during low tide.<ref name="Loizaga de Castro">{{cite journal |last1=Loizaga de Castro |first1=Rocio |last2=Dans |first2=Silvana Laura |last3=Coscarella |first3=Mariano Alberto |last4=Crepso |first4=Enrique Alberto |title=Living in an estuary: Commerson´s dolphin (''Cephalorhynchus commersonii'' (Lacépède, 1804)), habitat use and behavioural pattern at the Santa Cruz River, Patagonia, Argentina |journal=Latin American Journal of Aquatic Research |date=2013 |volume=41 |issue=5 |pages=985–991 |doi=10.3856/vol41-issue5-fulltext-17 |eissn=0718-560X |url=https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0718-560X2013000500017&lng=es&nrm=iso&tlng=en |access-date=11 December 2018 |via=SciELO }}</ref> They can be found in estuaries, especially during the breeding season.<ref name=Righi/><ref name="Loizaga de Castro"/>
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