![]() Males are generally larger and heavier than females. Description Ĭommon bottlenose dolphins are grey, and between 2 and 4 m (6.6 and 13.1 ft) long, and weigh between 150 and 650 kg (330 and 1,430 lb). The clade containing the offshore, Mediterranean, and Black Sea populations was sister to the western North Atlantic lineage, indicating deep divergence between the two. The study noted only weak differentiation between the Black Sea and Mediterranean lineages, and found them to form a sister group to the offshore lineage, indicating that they likely descended from offshore bottlenoses that colonized the Mediterranean and Black Seas. truncatus, each of which could be a distinct subspecies: a lineage native to the coastal regions of the western North Atlantic (off the coast of North America), an offshore lineage found worldwide in pelagic ecosystems, a lineage native to the Mediterranean, and a lineage restricted to the Black Sea (previously described as T. Ī 2020 study identified four distinct lineages within T. The name has since been reclassified as a junior synonym of Tursiops truncatus. gephyreus, or Lahille’s bottlenose dolphinīottlenose dolphins along the southern California and Baja California coasts were previously recognized as the Pacific bottlenose dolphin, T. ponticus, or the Black Sea bottlenose dolphin T. Ĭurrently, three common bottlenose dolphin subspecies are recognized: T. The two species are thought to have split during the mid- Pleistocene, about 1 million years ago. aduncus) was recognized as a separate species. That year, the Indo-Pacific bottlenose dolphin ( T. Until 1998, all bottlenose dolphins were considered one species T.
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