The Koi fish has a life span of over 200 years.
4. Bowhead Whale
Bowhead Whale has a average Life Span Over 200 Years.
3. Greenland shark
It has the longest known life which is not less than 274 years.
2. Arctica islandica
It have lifespan accounted for more than 507 years.
1. The immortal jellyfish
The immortal jellyfish is most likely the longest living animal since it can possibly live for eternity.