? There are many different species of jellyfish. The difference between these different species is relatively large, and their life span is different. Most jellyfish species have a relatively short life span. But there is a special kind of jellyfish, called "immortal jellyfish", which is the "lighthouse jellyfish" to be introduced next. This is a small jellyfish with a diameter of only 4-5 millimeters. They are shaped like lighthouses, hence the name.
In fact, although they are called "immortality", in fact, they are only rejuvenated. After reaching adulthood, lighthouse jellyfish can return to a more juvenile stage, when they are in the hydroid stage. They will slowly develop from this state into adult jellyfish. There are many reasons for their rejuvenation, such as trauma, changes in the surrounding environment and even hunger, which are all possible. In addition, lighthouse jellyfish use asexual reproduction to reproduce. When they return to the polyps, they can differentiate and grow hundreds of individuals through cell division and transformation, and the genetic material of these individuals is exactly the same. In theory, this process of rejuvenation is unlimited, and unlimited life span can be obtained by repeating this process.
? As mentioned above, in theory, the lighthouse jellyfish will not die, because they will return to the hydroid form after adulthood. This process is theoretically unlimited. That's not to say, though, that lighthouse jellyfish are immortal. Lighthouse jellyfish also have natural enemies. Some marine life will eat lighthouse jellyfish, in which case they will die.
