The life cycle of a jellyfish: Spawning, cloning and immortality

How Long Do Jellyfish Live? Are They All Immortal?

Meet the immortal jellyfish (Turritopsis dohrnii), one of nature’s most unbelievable creatures. Unlike most animals that age and die after reproducing, this jellyfish has the ability to reverse its life cycle. When it becomes old, injured, or faces stress, it can transform its adult cells back into a juvenile stage called a polyp through a rare process known as transdifferentiation. ‎ ‎From this juvenile stage, it grows again into a fully mature jellyfish - essentially starting life all over aga