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Whales evolved from land-living mammals, and must regularly surface to breathe air, although they can remain underwater for long periods of time. Some species, such as the sperm whale, can stay underwater for up to 90 minutes. [2] They have blowholes (modified nostrils) located on top of their heads, through which air is taken in and expelled.
The time spent under water in a single dive is usually limited to 9–18 minutes. [19] The bowhead is not thought to be a deep diver, but can reach a depth down to 150 m (500 ft). It is a slow swimmer, normally travelling around 2–5 km/h (0.56–1.39 m/s; 1.2–3.1 mph). [ 20 ]
Drone videos of gray whales off Oregon have revealed new details about how the marine mammals find food. ... bigger whales release air from their blowholes to help them stay underwater when they ...
Whales have an elongated head, especially baleen whales, due to the wide overhanging jaw. Bowhead whale plates can be 9 metres (30 ft) long. Their nostril(s) make up the blowhole, with one in toothed whales and two in baleen whales. [21]
And sperm whales function as a family, "Sperm whales are often spotted in groups (called pods) of some 15 to 20 animals. Pods include females and their young, while males may roam solo or move ...
The killer whales regularly demonstrate their competence by chasing seals up shelving gravel beaches, up to the edge of the water. The pursuing whales are occasionally partially thrust out of the sea by a combination of their own impetus and retreating water, and have to wait for the next wave to re-float them and carry them back to sea. [12]
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 winners of the Nature Photographer of the Year (NPOTY) 2024 competition have been announced! This prestigious event celebrates the very best in nature photography, showcasing stunning work ...