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Basic anatomy of the Killer Whale: Source: Own work: Author: Petruss: Other versions: Derivative works of this file: Orca anatomy fa.svg: Licensing. I, the copyright ...
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.
Diagram featuring the typical skeletal of a toothed whale (top) and a baleen whale (bottom) The cetacean skeleton is largely made up of cortical bone , which stabilizes the animal in the water. For this reason, the usual terrestrial compact bones, which are finely woven cancellous bone , are replaced with lighter and more elastic material.
The killer whale (Orcinus orca) is a documented predator of this species, and has been recorded chasing, attacking and killing a solitary adult strap-toothed whale approximately 50 km offshore of Bremer Bay in south-western Australia. [19] The main prey of the strap-tooth beaked whale is considered to be oceanic squid species.
The orca's anatomy is adapted to hearing underwater rather than in air. Incoming sounds, including echoes, are collected by the lower mandible , which functions as the orca's outer ear . The remaining parts of the two ears, in the auditory bullae , are connected to the rear of the lower mandible.
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Orca hunting a Weddell seal. The orca is known to prey on numerous other toothed whale species. One example is the false killer whale. [69] To subdue and kill whales, orcas continually ram them with their heads; this can sometimes kill bowhead whales, or severely injure them. Other times, they corral their prey before striking.