Are jellyfish immortal?
Turritopsis Dohrnii is officially the only immortal jellyfish and also the only known immortal crᴇᴀᴛure living on earth.
How do turritopsis dohrnii remain immortal?
The process that lets the turritopsis remain immortal is called transdifferentiation and it involves one cell converting from one type to another.
Thus, when the jellyfish reaches maturity, its cells can convert and it becomes a polyp again.
Immortal Jellyfish Life Cycle
The immortal jellyfish life cycle will never end. It goes through process that can make him immortal. There are two distinct stages of a jellyfish’s life cycle: the polypoid stage and the medusa stage.
It is no different to the turritopsis dohrnii, except that it can revert to its polyp stage at any time.
In order to do this reversion, the immortal jellyfish will use tissue from the circulatory canal system as well as the bell surface and the process used is called transdifferentiation.
But in order to undergo this transformation, the immoral jellyfish develops somehow some missing cell types like sensory cells. There is insufficient data regarding this process.
To understand its transformation and to get a full picture on the immortal jellyfish life cycle, the graphic below will help:
The rejuvenated jellyfish will reach its sexual maturity in less than 30 days if the water temperature is 20 degrees Celius or in 18-22 days if the water temperature is 22 degrees. After it reached maturity, it doesn’t automatically revert to its former statute. Go here and find more immortal jellyfish facts.
How old is the oldest immortal jellyfish?
You might want to know how old the oldest immortal jellyfish is, but unfortunately there is no answer to this.
No turritopsis dohrnii has been observed in a laboratory for an extended period of time, and there is no other way to establish the age of an individual.
Can you ᴋɪʟʟ an immortal jellyfish?
Won’t they populate the whole earth if they are immortal?
They are only biologically immortal, they still can be ᴇᴀᴛen by predators (and they certainly are ᴇᴀᴛen). But nonetheless, they are seen in new territories where they haven’t been seen before, as they are easily transported worldwide by cargo ships.
Who are immortal jellyfish predators?
The immortal Jellyfishes live in the sea and therefore their predators are sea animals most of the time: sea anemones, tunas, sharks, swordfish, sea turtles, even penguins. When they are found on the beach they can be ᴇᴀᴛen by any bird or terrestrial animal.
What is the immortal jellyfish size?
If you want to spot an immortal jellyfish in the ocean, be aware that it is barely visible. The turritopsis dohrnii is bell-shaped and it is at maximum 4.5mm (0.18 inch) tall and wide. They are tiny crᴇᴀᴛures. Younger turritopsises have only 8 tentacles and are 1 mm tall, while adult ones can have up to 90 tentacles.
Its large stomach is bright red colored. In its polyp form the dohrnii is made up of stolons and branches that can crᴇᴀᴛe medusa buds.
What is their habitat?
The immortal jellyfish prefers warmer waters, although it has been spotted in colder areas as well. They originate from the Caribbean Sea (nutricula) and the Mediterranean (dohrnii).
What do immortal jellyfish ᴇᴀᴛ?
Their diet consists of plankton, fish eggs and small mollusks.
Are there immortal jellyfishes for sale?
While rarely we heard about some being sold in Japan, they are quite rare. However, it is possible for them to be sold, but we have no information about any reliable source of nutricula or dohrnii for sale.