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The bowhead whale is the only baleen whale to spend its entire life in the Arctic and subarctic waters. [40] The Alaskan population spends the winter months in the southwestern Bering Sea. The group migrates northward in the spring, following openings in the ice, into the Chukchi and Beaufort seas. [41]
The humpback whale (Megaptera novaeangliae) is a species of baleen whale. It is a rorqual (a member of the family Balaenopteridae) and is the only species in the genus Megaptera. Adults range in length from 14–17 m (46–56 ft) and weigh up to 40 metric tons (44 short tons). The humpback has a distinctive body shape, with long pectoral fins ...
The gray whale (Eschrichtius robustus), [1] also known as the grey whale, [5] is a baleen whale that migrates between feeding and breeding grounds yearly. It reaches a length of 14.9 meters (49 ft), a weight of up to 41 tonnes (90,000 lb) and lives between 55 and 70 years, although one female was estimated to be 75–80 years of age.
The blue whale (Balaenoptera musculus) is a marine mammal and a baleen whale. ... Life span. Blue whales live around 80–90 years or more. [32] [55] ...
Fin whales have a maximum life span of at least 94 years of age, [45] although specimens have been found aged at an estimated 135–140 years. [46] The fin whale is one of the fastest cetaceans and can sustain speeds between 37 km/h (23 mph) [ 47 ] and 41 km/h (25 mph) and bursts up to 46 km/h (29 mph) have been recorded, earning the fin whale ...
Preliminary investigations suggested a beluga's life expectancy was rarely more than 30 years. [28] The method used to calculate the age of a beluga is based on counting the layers of dentine and dental cement in a specimen's teeth, which were originally thought to be deposited once or twice a year. The layers can be readily identified as one ...
The sperm whale is a pelagicmammalwith a worldwide range, and will migrate seasonally for feeding and breeding.[5] Females and young males live together in groups, while mature males (bulls) live solitary lives outside of the mating season. The females cooperate to protect and nursetheir young.
Very little is known about the life span of right whales. One of the few well-documented cases is of a female North Atlantic right whale that was photographed with a baby in 1935, then photographed again in 1959, 1980, 1985, and 1992. Consistent callosity patterns ensured it was the same animal. She was last photographed in 1995 with a ...