How long do jellyfish live for?

Answer 1

Usually, the common jellyfish would live up to a year or 2. Some live up to 5 years and other specific types may live up to 30 years. There is one type of jellyfish that can technically live forever, because it reverts back to the polypoid stage when it has matured enough.

Answer 2

Jellyfish lifespans typically range from a few hours (in the case of some very small hydromedusae) to several months. Life generally ends after the medusa has begun spawning. Life span varies by species. Most large coastal jellyfish live 2 to 6 months.