Immortal jellyfish: Does it really live forever?
The Turritopsis nutricula jellyfish has displayed a remarkable ability to regenerate its cells in times of crisis.
Photo: Peter Schuchert
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Immortal jellyfish: Does it really live forever?The Turritopsis nutricula jellyfish has displayed a remarkable ability to regenerate its cells in times of crisis.By Melanie Lasoff LevsWed, Apr 13 2011 at 1:33 PM EST
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Photo: Peter Schuchert While it is often joked that cats have nine lives, a certain species of jellyfish has been deemed “immortal” by scientists who have observed its ability to, when in crisis, revert its cells to their earliest form and grow anew. That means that these tiny creatures, 4 mm to 5 mm long, potentially have infinite lives.
The creature, known scientifically as Turritopsis nutricula, was discovered in the Mediterranean Sea in 1883, but its unique regeneration was not known until the mid-1990s. How does the process work? If a mature Turritopsis is threatened — injured or starving, for example — it attaches itself to a surface in warm ocean waters and converts into a blob. From that state, its cells undergo transdifferentiation, in which the cells essentially transform into different types of cells. Muscle cells can become sperm or eggs, or nerve cells can change into muscle cells, “revealing a transformation potential unparalleled in the animal kingdom,” according to the original study of the species published in 1996.
Since the Turritopsis’ virtual immortality was discovered, so have swarms of genetically identical jellyfish far from their original habitat, including in Japan, Spain and the Atlantic Ocean side of Panama. Researchers have concluded that these multiplying creatures are getting caught in ballast waters, water that is sucked into and pumped out of the long distance cargo ships. Polyps also could be growing on the ship’s hulls. Though genetically identical, these jellyfish seem to have adapted to their new environments. For example, specimens from swarms living in tropical waters have been found to have eight tentacles, while those discovered in temperate regions have 24 or more tentacles.
Turritopsis can — and do — die, however. Their regeneration only occurs after sexual maturation, therefore they can succumb to predators or disease in the polyp stage. But because the jellyfish are the only known animal with this “immortality,” scientists are studying them closely, with the hopes of applying what they learn to issues such as human aging and illness.
Know more about the "immortal jellyfish?" Leave us a note in the comments below.
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Related Topics: Animals
Comments
DAHAA
02/12/2012 10:40 AM
That's cool.
adriana
01/18/2012 16:29 PM
so can u live forever
Su
10/12/2011 12:43 PM
So we can learn to live forever? That sounds like a disaster waiting to happen
Skeeow
07/11/2011 13:06 PM
It's akin to growing a new heart, liver, lung, or any other organ or appendage you had was getting old or wasn't working correctly. I find it hard to believe you wouldn't be the same person with a new organ or appendage; anything short of a brain I guess. But then you'd have to discuss the implications of what it is to "be" someone, which is another philosophical topic entirely. I think that this discovery is fascinating, but I hope that innovations in medical technology never lead to the.... More
Cuprik
07/05/2011 15:53 PM
@Steve.
Anonymous
07/07/2011 00:40 AM
Everything? Make sure you use the right words when making such a huge implication.
Steve
07/05/2011 12:07 PM
The Thats not immortal..... once every thing has been replaced its then a new jellyfish?
Alan
07/07/2011 04:01 AM
It is completely different from your broom. Nothing new is being added to the jellyfish. It's the same genetic code. If your broom somehow morphed back into its original state without outside intervention then it would be more similar. Add your commentSign in with one of these accounts or just add your comment below. |
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