Urban Legends - The Immortal Jellyfish
Turritopsis Nutricula, the Immortal Jellyfish |
What if I
tell you there is a species of animal that can age both forwards and backwards,
making it an immortal living organism. And what if I tell you that the powerful
creature with this incredible characteristic is one of the tiniest jellyfish
ever seen. Well, in this case is completely fair saying that size doesn’t
matter. After the Random Facts about Jellyfish and The history of the BlueDragon (click the links for more), here the immortality life circle of Turritopsis
Nutricula, the Immortal Jellyfish.
Most
jellyfish have a lifetime of between a few hours to a few months. Few species
can also live for several years. But only the Turritopsis Nutricula have the unique
ability to live forever. They can grow old like every other living thing, but
then can reverse this process and turn young again. Unfortunately, this kind of jellyfish can
only grow to a maximum of around 1/5 of an inch in diameter, so they are an
extremely easy food for lots and lots of predators. But, without this jinx of
being an easy prey, this jellyfish has been able to achieve immortality.
Turritopsis Nutricula polyp stadium |
The life
circle of this creature is pretty simple.
The male jellyfish releases sperm into the water and it may unite with
the egg of a female. Eventually this
will produce a free swimming larva, called planulae, that abandons the body of
the female and float around until finally settling on the sea floor and
attaching to something strong and sturdy like a rock. The next form of this
creature is a polyp that look like a plant. This plant like animal feeds on
various things like plankton and, over a certain amount of time, a colony of
polyps will form from the single polyp, all connected with feeding tubes. Some years later, the colony of polyps will
begin producing free swimming jellyfish, the immortal ones.
The life circle of the jelly |
The Turritopsis
Nutricula float away with the currents, gathering food as they encounter
it. The real miracle happens when food
is scarce or they are injured or various other environmental issues occur. These events trigger a unique mechanism
within the animal that causes it to begin to grow younger.
In this
process, called transdifferentiation, cells are able to change themselves into other
cell. In this case (for the record, the Turritopsis Nutricula is the only
creature in the world that can use this process to rejuvenate at any point of
the jelly maturation) the jellyfish cells transform into the previous stadium
of polyp cells. All the cells of the organism grow young all the way to the point where they
once again become a single polyp, starting the process all over again.
After some
time, the polyp will be able to grow a new colony. Once again, other jellyfish are released from
the polyp colony, each with the same genetic code as the original jellyfish
that formed the polyp. It is thought
that this process can go on forever, assuming the animals don’t die of some
disease or aren’t killed by predator. This effectively makes them biologically immortal.
This is not
what normal people think when talking about immortality. But this can be
considered as the nearest thing to never-ending life. So think about it. A
jellyfish can last longer than humanity. Sometimes nature is wonderful, don’t
you think?
So, they are basically like Elves: they're immortal, as long as they don't get killed :D
ReplyDeleteExactly what I have always thought. These creatures are so wonderful :)
DeleteLike vampires! They never die. :) And so they prove that there is indeed forever.
ReplyDeleteAll this time I thought crocodiles are the oldest species since they exist even during the time of dinosaurs.
Believe me, my dear...Jellies will conquer the world. They're even more ancient than dinosaurs. Incredible but true ;)
Delete