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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.
Russian scientists working on the White Whale Program place transmitters onto whales in Sea of Okhotsk The beluga is considered an excellent sentinel species (indicator of environment health and changes), because it is long-lived, at the top of the food web, bears large amounts of fat and blubber, relatively well-studied for a cetacean, and ...
They may be numerous, with some dolphins bearing over 100 teeth in their jaws. At the other extreme are the narwhals with their single long tusks and the almost toothless beaked whales with tusk-like teeth only in males. [20] In most beaked whales the teeth are seen to erupt in the lower jaw, and primarily occurs at the males sexual maturity. [21]
The existing population, known as orca or killer whale, are a well known apex predator readily distinguished by their great size, 7 to 10 metres long, and mostly black and white coloring. These are highly intelligent and gregarious animals, able to communicate, educate, and cooperate in hunting the largest marine animals.
Odontocetes, such as the sperm whale, possess teeth with cementum cells overlying dentine cells. Unlike human teeth, which are composed mostly of enamel on the portion of the tooth outside of the gum, whale teeth have cementum outside the gum. Only in larger whales, where the cementum is worn away on the tip of the tooth, does enamel show.
A great white shark has several rows of teeth and preys on marine mammals such as sea lions. ©Martin Heyn/iStock via Getty Images. ... great white sharks are not known to hunt humans. It doesn ...
Lobster diver Michael Packard claims that he was “swallowed” by a humpback whale off Cape Cod’s Herring Cove Beach on June 11, 2021, and recalls everything going “completely black.” He ...
Calves are black or dark blue with a white belly. Females reach maturity at an average length of 5.8–6.7 m (19–22 ft) and males at 5.8–7.0 m (19–23 ft), weighing about 2 to 3.5 tons. [20] Cuvier's beaked whale is an odontocete — or toothed whale. Erupted teeth are only present in the adult males. [18]