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Oceanic dolphins

Oceanic dolphins are the members of the Delphinidae family of cetaceans. These aquatic mammals are related to whales and porpoises.

As the name implies, these dolphins tend to be found in the open seas, unlike the river dolphins, although a few species such as the Irrawaddy Dolphin are coastal or riverine.

Six of the larger species in the Delphinidae, the Orca and its relatives, are commonly called whales, rather than dolphins. They are also sometimes collectively known as "blackfish".

The Delphinidae vary in size from 1.2 metres and 40 kg (Heaviside's Dolphin), up to 7 metres and 4.5 tonnes (the Orca). Most species weigh between about 50 and about 200 kg. They are found worldwide, mostly in the shallower seas of the continental shelves, and all are carnivores, mostly taking fish and squid.

Family Eschrichtiidae: Gray Whale
Family Balaenopteridae: rorquals
Family Balaenidae: right whales and Bowhead Whale
Family Neobalaenidae: Pygmy Right Whale
Superfamily Platanistoidae: All river dolphins
Family Platanistidae: Indus and Ganges river dolphins
Family Lipotidae: Baiji (Yangtze River Dolphin)
Family Iniidae: Boto (Amazon River Dolphin)
Family Pontoporiidae: Franciscana (La Plata Dolphin)
Family Delphinidae
Genus Peponocephala
Melon-headed Whale, Peponocephala electra
Genus Orcinus
Orca (Killer Whale), Orcinus orca
Genus Feresa
Pygmy Killer Whale, Feresa attenuata
Genus Pseudorca
False Killer Whale, Pseudorca crassidens
Genus Globicephala
Long-finned Pilot Whale, Globicephala melas
Short-finned Pilot Whale, Globicephala macrorhynchus
Genus Delphinus
Long-beaked Common Dolphin, Delphinus capensis
Short-beaked Common Dolphin, Delphinus delphis
Genus Lissodelphis
Northern Rightwhale Dolphin, Lissodelphis borealis
Southern Rightwhale Dolphin, Lissodelphis peronii
Genus Sotalia
Tucuxi, Sotalia fluviatilis
Genus Sousa
Indo-Pacific Hump-backed Dolphin Sousa chinensis
Atlantic Humpbacked Dolphin, Sousa teuszii
Genus Stenella
Atlantic Spotted Dolphin, Stenella frontalis
Clymene Dolphin, Stenella clymene
Pantropical Spotted Dolphin, Stenella attenuata
Spinner Dolphin, Stenella longirostris
Striped Dolphin, Stenella coeruleoalba
Genus Steno
Rough-toothed Dolphin, Steno bredanensis
Genus Tursiops
Bottlenose Dolphin, Tursiops truncatus
Genus Cephalorhynchus
Chilean Dolphin, Cephalorhynchus eutropia
Commerson's Dolphin, Cephalorhynchus commersonii
Heaviside's Dolphin, Cephalorhynchus heavisidii
Hector's Dolphin, Cephalorhynchus hectori
Genus Grampus
Risso's Dolphin, Grampus griseus
Genus Lagenodelphis
Fraser's Dolphin, Lagenodelphis hosei
Genus Lagenorhynchus
Atlantic White-sided Dolphin, Lagenorhynchus acutus
Dusky Dolphin, Lagenorhynchus obscurus
Hourglass Dolphin, Lagenorhynchus cruciger
Pacific White-sided Dolphin, Lagenorhynchus obliquidens
Peale's Dolphin, Lagenorhynchus australis
White-beaked Dolphin, Lagenorhynchus albirostris
Genus Orcaella
Irrawaddy Dolphin, Orcaella brevirostris
Family Phocoenidae: porpoises
Family Monodontidae: Beluga and Narwhal
Family Physeteridae: Sperm Whale
Family Kogiidae: Pygmy Sperm Whale and Dwarf Sperm Whale
Family Ziphiidae: beaked whales