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Hobbs, Jean-Paul A., Newman, Stephen J., Mitsopoulos, Gabby E. A., Travers, Michael J., Skepper, Craig L., Gilligan, Justin J., Allen, Gerald R., Choat, Howard J., Ayling, Anthony M. (2014): Fishes of the Cocos (Keeling) Islands: new records, community composition and biogeographic significance. Raffles Bulletin of Zoology 30: 203-219
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Hobbs et al. (2014) studied this question.
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