The immortal jellyfish is a translucent creature measuring about 3 to 4.5 millimeters (about 0.1 inches) in diameter when fully grown. That's about the size of a small stud earring.

It has been dubbed the immortal jellyfish. When the medusa of this species is physically damaged or experiences stresses such as starvation, instead of dying it shrinks in on itself, reabsorbing its ...

A closeup shot of a glowing blue jellyfish in black water. One species stands out for its extraordinary ability: Turritopsis dohrnii, also known as the immortal jellyfish. This fingernail-sized ...

The so-called immortal jellyfish resembles a tiny, hairy thimble and lives in the Mediterranean Sea and also off Japan. Members of the species can reverse the aging process so that instead of ...

The immortal jellyfish, known as Turritopsis dohrnii, has the ability to reverse age and theoretically live an eternal life. Because of its ability to regrow its cells, it could theoretically escape ...