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The orca (Orcinus orca), or killer whale, is a toothed whale and the largest member of the oceanic dolphin family. It is the only extant species in the genus Orcinus and is recognizable by its black-and-white patterned body. A cosmopolitan species, it is found in diverse marine environments, from Arctic to Antarctic regions to tropical seas.
Orcinus is a genus of Delphinidae, the family of carnivorous marine mammals known as dolphins. It includes the largest delphinid species, Orcinus orca, known as the orca or killer whale. Two extinct species are recognised, Orcinus paleorca and O. citoniensis, describing fossilised remains of the genus. [2] The other extinct species O. meyeri is ...
A third type of killer whale roams the Pacific, but less is known about it; these offshore whales live farther out and prey on sharks and other large fish. A recent study found evidence of another ...
[2] Some examples of variations in orcas. Type A or Antarctic orcas look like a "typical" orca, a large, black-and-white form with a medium-sized white eye patch, living in open water and feeding mostly on minke whales. [2] [4] Type B1 or pack ice orcas are smaller than type A. [4] It has a large white eye patch.
Six species of dolphins have the word "whale" in their name, collectively known as blackfish: the orca, or killer whale, the melon-headed whale, the pygmy killer whale, the false killer whale, and the two species of pilot whales, all of which are classified under the family Delphinidae (oceanic dolphins). [6]
Pygmy killer whale, Feresa attenuata DD; Short-finned pilot whale, Globicephala macrorhynchus DD; Long-finned pilot whale, Globicephala melas DD (ssp. edwardii - southern long-finned pilot whale NE, ssp. melas - North Atlantic long-finned pilot whale NE, unnamed spp. - North Pacific long-finned pilot whale EX) Risso's dolphin, Grampus griseus LC
ABOARD A BOAT IN THE STRAIT OF GIBRALTAR — From the surface, the azure waters seem calm and inviting in this narrow patch where the Atlantic Ocean meets the Mediterranean Sea.. Spain’s arid ...
In comparison, the modern killer whale has teeth around 8 cm (3.1 in) in height and 2.5 cm (0.98 in) in diameter. [3] Like the modern killer whale, the tooth lacks a coat of cementum. However, unlike the modern killer whale, O. paleorca had a circular tooth root as opposed to an oval, and the pulp extended more towards the back than the front. [2]