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Greenland sharks have also been found with remains of moose, polar bear, horse, and reindeer (in one case an entire reindeer body) in their stomachs. [13] [26] [22] The Greenland shark is known to be a scavenger and is attracted by the smell of rotting meat in the water.
Greenland shark reproduction remains mysterious, according to Britannica. Scientists believe that females begin reproducing after reaching about 13 feet in length — or about 150 years in age.
Unlike most sharks and other vertebrates, which have hard tissues like spines that form growth rings (much like the rings inside a tree trunk), Greenland sharks lack these structures, making age ...
Many sharks can contract and dilate their pupils, like humans, something no teleost fish can do. Sharks have eyelids, but they do not blink because the surrounding water cleans their eyes. To protect their eyes some species have nictitating membranes. This membrane covers the eyes while hunting and when the shark is being attacked.
Parthenogenesis in sharks has been confirmed in the bonnethead [35] and zebra shark. [36] Other, usually sexual species, may occasionally reproduce parthenogenetically, and the hammerhead and blacktip sharks [37] are recent additions to the known list of facultative parthenogenetic vertebrates. A special case of parthenogenesis is gynogenesis.
But, in reality one of the ocean's largest sharks lives here. Nicknamed the sleeper shark, Greenland sharks are very slow moving and mostly Mysterious giant sharks may be everywhere
Before striking, the sharks compact schools of prey by swimming around them and splashing the water with their tails, often in pairs or small groups. Threshers swim in circles to drive schooling prey into a compact mass, before striking them sharply with the upper lobe of its tail to stun them.
The crew had never “seen anything quite like it.”