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10 Immortal Animals You Won't Believe Are Real | Interesting Facts

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10 Immortal Animals You Won't Believe Are Real | Interesting Facts
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Believe It Or Not – Surely All These Animals Greatly Outlive You

We know the life cycle; an animal is born, grows up, becomes an adult, reproduces, ages, gets old and finally dies. This is a universal truth about animal life on earth. Aging is a natural process for all living beings. In biology, it called senescence. Birth slowly becomes death by way of aging (if not by accident, disease or falling prey) in a natural life process.

Therefore, it is hard to believe that some animals are almost immortal. There are a few species of animals in which the process of aging is extremely slow. Their life span is much longer in comparison to that of a human being. This is termed as “negligible senescence”. Here the symptoms of aging are so faint that it seems like they can never die.

Tortoise
As children, all of us might have heard or read about the tortoise’s immortality. The life span of a tortoise is 150 to 250 years. A tortoise shell contrary to common belief actually has 60 different interconnected bones.

Red Sea Urchin
Sea urchins usually live in warm waters close to the coral reefs or on the rocky bottom. Their life spans up to 200 years. They never stop growing but don’t get old. Their mouth has five sharp teeth and they can drill a hole in a rock. Sea urchins originated roughly 450 million years ago.


Rougheye Rockfish
Rougheye rockfish are probably one of the longest living marine fish, living as long as 200 years. “Red Snapper”, which you can sometimes find on restaurant menus, are actually rockfish. They do not lay eggs but give birth to young ones. Rockfish have a bladder that adjusts to their buoyancy as per depth levels inside the sea.

Carp Koi
Carp Koi have a lifespan of over 200 years. Koi fish represent love and friendship in Japanese culture. As a gift, they are believed to bring good luck; so traditionally they are handed over from one generation to the next in Japanese families. Koi have no stomach, instead, they only have a gut.

Bowhead Whale
They are believed to live up to 200 years. The Bowhead whale can grow up to a length of 66 ft. and weigh as much as 100 tons. Bowhead whales were massively hunted for their meat and oil. A bowhead whale can blow air up to 20 feet in height and are strong enough to easily break a one-foot thick ice layer.

Ocean Quahog
World’s oldest ocean quahog was 507 years old before its death in 2006. They are able to live for centuries because of their very slow metabolism. This ocean quahog was named after Chinese dynasty “Ming”.

Freshwater Pearl Mussel
Freshwater pearl mussels possess negligible senescence. They have a life span of 210–250 years. Freshwater mussel species have the ability to create a pearl.

Antarctic Sponge
The Antarctic sponge has an extremely slow growth rate because of the very low temperature there; some of the oldest known specimens are as old as 1550 years. Sponges have been inhabiting earth for the last 600 million years.

Turritopsis Dohrn jellyfish
This jellyfish discovered in 1883 can truly be called immortal because of its unique regenerative powers which came to our knowledge only two decades back. Its cells can transform into different kinds of cells like a muscle cell can change into a sperm cell or even an egg cell or vice versa.

Water Bear
Water bears, also known as tardigrades or moss piglet have existed for 530 million years. They have some super powers which make them virtually immortal. They can stop all their metabolic activities completely by a process called cryptobiosis. Water bears do not grow by cell division. Their cells just expand to a bigger size.

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