Resident populations of the Indo-Pacific humpbacked dolphin and the Indian Ocean bottlenose dolphin occur in the waters around the island. The bottlenose dolphin's abundance fluctuates seasonally, increasing during the austral winter. The humpback dolphin is more sedentary, living in extremely shallow inshore areas of the western and southern coasts, and form larger groups (11-14 dolphins) than recorded elsewhere in southern Africa. Bottlenose dolphins frequent the waters of the northwestern coast, and their group size varies largely from individuals and pairs to hundreds of dolphins.Bandeira O. S., Silva E. P. R., Paula J., Macia A., Hernroth L., Guissamulo T. A., Gove Z. D. Marine biological research in Mozambique: past, present and future. University of Eduardo Mondlane on ResearchGate. Retrieved on December 18, 2014
