Jellyfish, which is well known to human beings, can live for about a year. Take jellyfish in Bohai Bay as an example. Small jellyfish began to grow in spring, became adults in summer, laid eggs in September, and almost died when 10 ended. Other jellyfish live for about a year or two.
Jellyfish will go through two stages in their life: hydra (fixed life) and aquatic substrate (swimming life). Generally, jellyfish can only keep the aquatic substrate until they die after they change from hydra to aquatic substrate.
However, some scientists have found that if a "lighthouse jellyfish" encounters environmental deterioration in the laboratory environment, it will change from water matrix to hydra. It's like going back in time.
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Lighthouse jellyfish
Lighthouse jellyfish, like other jellyfish, are divided into two types: male and female, and reproduce through fertilization. Usually, they will die in the traditional way.
However, in case of emergency, lighthouse jellyfish will not die as usual, but "turn their body cells into rejuvenation". However, this "reverse growth" is conditional, and it will only happen when they encounter hunger, physical injury or other sudden crises.
At this time, the lighthouse jellyfish will transform itself into a drop-shaped capsule, and then continue to develop from this capsule into the original life form of jellyfish-a group of polyps.
In this process, all cells of lighthouse jellyfish will be transformed, among which muscle cells will be transformed into neuron cells, or sperm and eggs. Through asexual reproduction, this group of corals will grow into hundreds of jellyfish with almost the same DNA as the previous adult lighthouse jellyfish.
The ability of lighthouse jellyfish to avoid death makes it an immortal in biological theory.
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