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There are many kind of turtles, crocodiles, lobsters and alligators that live longer because of their ability to tackle senescence.
But what animal can live forever? I am in search of a really immortal creature on earth. Yes there are many arguments there on web. But I need an exact, proven answer.

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Unfortunately, no animal on Earth is truly immortal. All living organisms will eventually die, even if they don't age or succumb to disease or injury.
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Greenland shark: Greenland sharks are known for their exceptional longevity. Some individuals have been estimated to live for over 400 years, although their exact lifespan is difficult to determine accurately.

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Jelly fish turritopsis dohrnii  is the only species that that is being referred as an biological immortal due to it nature, this species are small and transparent and found in oceans , this organism turns back time by reverting to earlier age of their life cycle

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There is no animal that can live forever, but that is because of the ability of senescence. Senescence is the life extensions to cells, and as more and more cells are added to the body, the life of the turtle, lobster, or alligator may be longer than if they were not senescent.
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There is no animal that never dies. All living organisms have a finite lifespan and eventually die due to biological processes, predation, disease, or environmental factors.
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In the seas of the Mediterranean lives a jellyfish with an extraordinarily rare ability – it can rewind its life cycle. The so-called 'immortal' jellyfish, or Turritopsis dohrnii, can somehow reprogramme the identity of its own cells, returning it to an earlier stage of life.
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The 'immortal' jellyfish, Turritopsis dohrnii

To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
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There is no animal that is known to be immortal, meaning that it can live forever without dying. However, there are some species that have extremely long lifespans, such as the bowhead whale, which can live over 200 years, and the immortal jellyfish, which can revert back to a younger form and start its life cycle over again.
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Turritopsis dohrnii (Immortal jellyfish): This species of jellyfish has the ability to revert back to an earlier stage in its life cycle after reaching maturity. It can transform its adult cells back into immature cells, effectively resetting its lifespan.

Hydra: Hydras are small, simple aquatic animals that have impressive regenerative abilities. They can regenerate their entire body from just a tiny fragment and show no signs of senescence or aging.

Lobsters: While lobsters do not possess immortality, they exhibit negligible senescence, meaning their aging process is significantly slowed down compared to other organisms. They can live for several decades and continue to grow throughout their lives.

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There is no animal that is truly immortal, as all living creatures eventually die. However, some species have evolved ways to extend their lifespans and avoid the effects of aging. For example, some species of jellyfish, such as Turritopsis dohrnii, are able to revert back to a younger state when they are injured or stressed, allowing them to essentially live forever. Additionally, some species of turtles, such as the Galapagos tortoise, can live for over 100 years.
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The animal that never dies in the world is the eagle  when he is old he stays in a particular tree  and take out his fingers,bicks and feathers then new ones grows out again.
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The immortal jellyfish: It has been dubbed the immortal jellyfish. When the Medusa of this species is physically damaged or experiences stresses such as starvation, instead of dying it shrinks on itself, reabsorbing its tentacles and losing the baility to swim. It then settles on the seafloor as a blob-like cyst, therefore never dying.
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There is no known animal that is biologically immortal, meaning it never experiences natural death due to aging. While certain organisms like the Turritopsis dohrnii jellyfish can exhibit rejuvenation through a process called transdifferentiation, they are not truly exempt from death as they can still be affected by disease, predation, or environmental factors. However, it's important to note that some species, like certain bacteria and hydras, can exhibit extraordinary regenerative abilities, allowing them to potentially live indefinitely under ideal conditions.
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There's only one species that has been known as everlasting. It is a a kind of the jellyfish named Turritopsis dohrnii. These are found in the Mediterranean Sea and also near Japan.The are nicknamed as immortal jellyfish.When these jellyfish reaches a certain age, they convert their cells backwards i.e. it can become young again.
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but there isn't an animal that never dies. All living organisms, including animals, have lifespans, and eventually, they will all pass away. While some animals, such as certain jellyfish and turtles, have longer lifespans compared to others, they still have a natural lifespan limit and eventually die. However, certain organisms, like Hydra, have the ability to continuously regenerate and potentially live indefinitely under favorable conditions, but they are still subject to death due to various external factors.
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