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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]
Once prey is caught, the otters use their powerful jaws and sharp teeth to consume their meal quickly, even protective crustacean shells. They have canines that deliver a lethal bite, and molars that can crush bones and the shells of mollusks. Sea otter molars are broad, flat, multi cuspid teeth and the carnassial are also modified for crushing.
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 ...
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.
Two orcas, the matriarchs among the group of about 30 whales, on April 2 circled a 20-foot-long minke whale, according to Colleen Talty, a research biologist with Monterey Bay Whale Watch.
Drone videos of gray whales off Oregon have revealed new details about how the marine mammals find food. The findings were described in studies this summer. Drone video of gray whales offers new ...
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.
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 ).