Originally Posted by Fish
One day this jellyfish could allow your descendants to live thousands of years or more... This jellyfish is immortal. Seriously. It does this through the cell development process of transdifferentiation. Cell transdifferentiation is when the jellyfish "alters the differentiated state of the cell and transforms it into a new cell". Essentially, this jellyfish has overcome cellular breakdown to indefinitely give itself new cells.
This is really cool.
However, it will not "allow your descendants to live thousands of years or more", mainly because we don't have a polyp stage, we are far more complex, and our cells are governed by different processes.