A slow-growing shark species exists in the Arctic Ocean, taking 100 years to reach maturity and needing half a century to find a mate.

In the animal kingdom, some animals have short lives, such as mayflies, their lifespan is extremely short, only lasting for a few hours, or a few days at most, so they almost all of their time and energy are used for reproduction and mating, and some animals have very long lives, which can reach several centuries, such as the Greenland shark in the deep sea, which is known for its slowness—Greenland sharkThey are slow in speed and growth, 100 years haven't reached the maturity period, until 150, 160 years old to start breeding offspring, and after that, female Greenland sharks produce one or two offspring every few years, and each time they can give birth to several small sharks, which means this shark needs half a century to find a mate, and its lifespan is generally more than 400 years, it is the longest-lived vertebrate known on earth!

Greenland shark

First is slow swimming speed, as a representative of giant sharks, adult body length can reach 5 meters, the average swimming speed is only 0.34 meters/second, which is slower than turtles, it's a ‘turtle speed’ that moves slowly and leisurely,

Greenland sharkGreenland shark grows slower, Greenland shark’s maximum length can reach 7 meters, but according to research: this shark grows very slowly, About 1 centimeter a year

And only this shark can grow like this, because it has enough time and lifespan to grow,

Greenland shark’s ferocityGreenland shark’s speed is slow, but it’s not easy to bully, few predators dare to hunt this shark, one is its own defense, it has toxins, Contains a nerve toxin

Which makes hunters reluctant to catch it, the second is Greenland shark’s personality itself is fierce, although it is called ‘sleeping shark’, but Greenland sharks eat fish and crustaceans, and some mammals, such as dolphins, and occasionally eat polar bears and sea turtles,

Greenland shark

Greenland shark has partial blindness, but its distribution is widespread, Because it often moves in the deep sea, plus slow swimming speed, Greenland sharks’Cornea is eaten by a parasite

Which causes partial blindness in Greenland sharks, but Greenland sharks can sense light in the dark, so they wait for prey to come,

Greenland shark’s slow speed, but it’s not motionless, it likes to move slowly, it’s most commonly distributed in the Arctic and North Atlantic seas at a depth of 1200 meters, but it can live at different depths in the sea, so Greenland sharks have a wide distribution, and Greenland shark’s shadows will often appear in many seas,

Greenland shark’s longevity mysteryGreenland shark is the longest-lived vertebrate known on earth, which naturally attracts human research, to explore the mystery of Greenland shark’s longevity, it is speculated that Greenland sharks can live so long because they swim slowly in the cold deep sea, and consume less energy, Natural metabolism is slow

But this is only one guess, and in the same environment, other fish don’t live so long, Greenland sharks must have other unique secrets or unique biological cells, waiting to be further studied,

Greenland shark’s population crisis

A 500-year-old Greenland shark was once discovered, which has been alive since the Ming Dynasty, if there is no human destruction, they can live for a long time, but humans make their teeth into knives, and make fish oil into oil lamps, when Greenland sharks are still single fish, they are ruthlessly hunted, Greenland sharks are facing a crisis, and they are now listed as endangered species and protected!