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The orca's teeth are very strong, and its jaws exert a powerful grip; the upper teeth fall into the gaps between the lower teeth when the mouth is closed. The firm middle and back teeth hold prey in place, while the front teeth are inclined slightly forward and outward to protect them from powerful jerking movements.
In orcas, false killer whales, short-finned pilot whales, narwhals, and belugas, there is an unusually long post-reproductive lifespan in females. Older females, though unable to have their own children, play a key role in the rearing of other calves in the pod, and in this sense, given the costs of pregnancy especially at an advanced age ...
Orcas or killer whales have a cosmopolitan distribution and several distinct populations or types have been documented or suggested. Three to five types of orcas may be distinct enough to be considered different races , [ 1 ] subspecies , or possibly even species [ 2 ] (see species problem ).
Tracking the Humboldt Current orcas and knowing what the killer whales are hunting and eating will help conservation groups protect the orcas, which are described as “data deficient” by the ...
The teeth sit outside of the mouth, interlocking, with two large lower fangs that curl upward reaching past the fish’s eyes. Because its jaw can unhinge, the viperfish can eat large prey for its ...
A large number of whales visiting the waters off New England included an uncommon sighting of an orca eating a tuna and an unusually large group of an endangered species of whale, scientists said.
Bigg was the first to identify transient orcas as significantly different in eating habits, behavior, and distribution from resident orcas; hence they bear his name. His recommendation in the late 1970s that orcas be placed on the endangered list in Canada fueled interest in protecting the animals throughout the region.
Northern resident orcas, also known as northern resident killer whales (NRKW), are one of four separate, non-interbreeding communities of the exclusively fish-eating ecotype of orca in the northeast portion of the North Pacific Ocean.