Dear student,
Mayflies are the organisms with the shortest life span of only 24 hours. Therefore, they are also called as ''one-day insect''.
There are many organisms with large lifespan.Some of them are :
1. Arctica Islandica (Ocean quahog)- 400 years (approximately)
2. Bowhead whales - 200 years (approximately)
3. Galapagos giant tortoise- 150-200 years.
4. Greenland sharks- 200 years
5. Tuataras - 100-200 years
6. Koi (Japanese species of fishes) - over 200 years, etc.
Regards.