Ll bottlenose dolphins around the world were previously recognized as T. truncatus, but recently the genus has been split into two species: T. truncatus and T. aduncus the smaller Indo-Pacific Bottlenose Dolphin ââ¬â Wang et al. 1999, 2000a,b. However, the taxonomy of bottlenose dolphins is confused, due to geographical variation, and it is very possible that additional species will be recognized in the future. For example, two forms in the North Atlantic, an offshore and a coastal form, are distinguishable on the basis of morphology and ecological markers e.g., Mead and Potter 1995, have fixed genetic differences and, therefore, eventually may be assigned to different species Leduc and Curry 1997, Hoelzel et al. 1998, Reeves et al. 2003.
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