00:00The Greenland shark is one of the most mysterious and longest-living vertebrates on Earth, found
00:06mainly in the deep, cold waters of the North Atlantic and Arctic Ocean. This elusive species
00:12has captured scientists and popular attention due to its unique adaptation to fresh environment
00:19and incredible longevity. One of the most fascinating facts about the Greenland shark
00:25is its exceptional lifespan. Studies using radiocarbon dating techniques on the eye
00:31lenses of these sharks suggest that they can live for at least 272 years, with some individuals
00:38estimated to be as old as 400 to 500 years. This makes the Greenland shark the longest-living
00:45vertebrates known to science. Greenland sharks are among the largest species of sharks.
00:51They can reach a length of up to 21 feet, though most adults typically measure between 12 and 15 feet.
00:59They can over 2,000 pounds. Despite their massive size, these sharks move very slowly.
01:05As far as the diet is concerned, the Greenland sharks are opportunistic feeders and are known
01:10to eat a wide range of food. Their diet includes fish, squid, and carrion, including dead whales and
01:17seals. Interestingly, parts of reindeer, horses, and even polar bears have been found in their stomachs,
01:24suggesting they sometimes quench large terrestrial animals that end up in the sea. They are also
01:30capable of catching live prey, although they rely more on stealth than speed. As apex predators,
01:37adult Greenland sharks have few natural enemies. However, juvenile sharks might fall prey to larger sharks or
01:45killer whales. Human activity like fishing by catch and habitat disruption is a potential threat,
01:52but due to their deep-sea habitat, they are less exposed to these dangers compared to other marine
01:58animals. As far as the speed, the Greenland shark is not a fast swimmer. It typically crosses at a speed
02:05of around 0.3 meters per second. This slow movement has earned it the nickname sleeper shark. Despite their
02:12sluggishness, they are still effective predators and squangers in the deep sea. As far as the teeth
02:19concerns, the Greenland sharks have distinct teeth adapted for gripping and cutting. The upper jaw has
02:26narrow pointed teeth, while the lower jaw features broader serrated teeth that slice through flesh.
02:32This dental design helps them both in hunting and squanging, especially when feeding on large carcasses.
02:40Moreover, the Greenland shark attack in 1859 is a curious reference to the Greenland shark attack.
02:47Although historical documentation is sparse and debated, an anecdotal account of Greenland shark
02:54was believed to have attacked a human. But given the species, slow nature and preferences for squanging,
03:01most scientists consider Greenland sharks to be non-aggressive towards humans. There is no verified
03:07modern record of an unprovoked Greenland shark attack. The 1859 case may have been misinterpreted or based
03:15on limited information. Sadly, many Greenland sharks suffer from partial blindness due to a persistent
03:23parasite that attaches to their eyes. Despite this challenge, these resilient creatures continue to
03:29thrive in the icy depths, captivating researchers and ocean anthropologists. The Greenland shark remains a
03:36symbol of the deep ocean mystery, aging quietly in icy waters and reminding us how much we still have
03:42to learn about the ancient life beneath the sea. If you like this video, please comment, share and subscribe.
03:49Thanks for watching.
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