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Some stalking bears need to move through water; traversing through water cavities in the ice when approaching the seal or swimming towards a seal on an ice floe. The polar bear can stay underwater with its nose exposed. When it gets close enough, the animal lunges from the water to attack. [107]
Although polar bears spend most of their time on the ice rather than in the water, polar bears show the beginnings of aquatic adaptation to swimming (high levels of body fat and nostrils that are able to close), diving, and thermoregulation. Distinctly polar bear fossils can be dated to about 100,000 years ago.
Researchers tracked polar bears with GPS system collarsand recorded long-distance swims up to 354 kilometres (220 mi), with an average of 155 kilometres (96 mi), taking up to ten days. [89] A polar bear may swim underwater for up to three minutes to approach seals on shore or on ice floes while hunting. [90] [91]
This caused polar bears to spend about 130 days on land each year. Scientists predict that in the future, there will be an additional five to ten days without sea ice per decade. Show comments
Polar bears hunt primarily at the interface between ice, water, and air; they only rarely catch seals on land or in open water. [69] The polar bear's most common hunting method is still-hunting: [70] The bear locates a seal breathing hole using its sense of smell, and crouches nearby for a seal to appear. When the seal exhales, the bear smells ...
While the Polar Play Zone is an underwater viewing area where you can see otters dive, dolphins splash and penguins drift through the water. 23. The Florida Aquarium, Florida
Marine mammals are aquatic mammals that rely on the ocean for their existence. They include animals such as sea lions, whales, dugongs, sea otters and polar bears. Like other aquatic mammals, they do not represent a biological grouping. [26] The humpback whale is a fully aquatic marine mammal.
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