Marine animals that grow very old

Immortality exists! When the immortal jellyfish gets injured, ages or is in an unfavorable environment, it shrinks to a cyst, from which a polyp grows. Polyps develop again into adult jellyfish. Learn more about marine animals that grow very old: https://medium.com/a-microbiome-scientist-at-large/wanna-grow-old-these-4-marine-animals-know-the-art-of-not-aging-6b8d0ba13ba0

Some marine animals can grow a lot older than humans (credit: FOTOGRIN on Shutterstock)