7 Longest-Living Animals

Hydra:

Potentially immortal due to their regenerative capabilities, hydras can theoretically live indefinitely if not exposed to external threats.

Turritopsis dohrnii (Immortal Jellyfish):

This jellyfish can revert to its juvenile form after maturing, allowing it to potentially avoid death from aging.

Glass Sponge:

Some species of glass sponges can live for over 10,000 years, with one specimen estimated at 11,000 years old.

Black Coral:

Known to live for over 4,000 years, black corals are among the longest-living marine organisms.

Ocean Quahog Clam (Arctica islandica):

These clams can live for over 500 years, with one individual recorded at 507 years old.

Tubeworm:

Certain species of tubeworms can exceed 300 years in age, thriving in stable environments like cold seeps.

Greenland Shark:

Estimated to live at least 272 years, with some individuals potentially reaching ages of over 500 years.