Animals living under natural conditions rarely approach their maximum possible age because of very high death rates due to infant mortality, diseases, predators, bad weather, habitat destruction, or competition for food and shelter.
10. Red Sea Urchin
Red sea urchins are believed to be almost immortal. They are found in the shallow water of the Pacific Ocean along the West Coast of North America. These small, spiny creatures have been known to live for more than 200 years.
9. Koi Fish
Koi usually live for 25-30 years but there are reports of koi that have reached ages of over 200 years old! One famous koi in Japan, named “Hanako”, died in 1977 and a study of the growth rings of one of her scales reported that she was 226! This made her older than the United States of America!
8. Long Finned Eel
Native to New Zealand and Australia, these eels often live to 60 years old with the oldest living Long Finned Eel recorded as being 106 years old! Like the greenland shark these fish grow very slowly which is why they can grow so old.
Photo credit: Carpenter0 (Wiki Commons User)
Macaws can live up to 60-80 years, while their breeding age ranges from 30 to 35 years. Unfortunately the majority of macaws are now endangered in the wild and a few are already extinct due to habitat degradation and the illegal pet trade.
Picture Credit: arpingstone (Wiki Commons User)
The largest surviving land-animals have an average lifespan of 70 years and a recent Zimbabwean study has found that female African elephants can potentially remain fertile until their death!
The largest living species of tortoise that can survive well past a hundred, with the oldest recorded at 152. The most famous Galapagos Tortoise was ‘Lonesome George’, a sub species who lived on the Islands, he was 100 years old and still classed as a young adult! He had become an ambassador of sorts for the islands off the coast of Ecuador whose unique flora and fauna helped inspire Charles Darwin’s theories on evolution.
Picture Credit: Sambodhi Sakhar
Bowhead whales have an average lifespan of 200 years and are the second largest mammal after the blue whale. They’re old age was discovered when a live animal was found with a harpoon that dated to over 100 years ago embedded in it’s skin!
Picture Credit: Bering Land Bridge national Preserve (Wiki Commons)
3. Greenland Shark
These sharks can reach ages of 200 years old although one individual was found that was 400 years old – making it the oldest vertebrate in the world. They live so long because they grow very slowly. They grow about 1cm a year and reach maturity at about 100 years old, now that’s a long childhood!
Photo credit: NOAA Okeanos Explorer Program
2. Ocean Quahog
Some collected specimens have been calculated to be more than 400 years old. These animals show exceptional longevity with a highest reported age, for ‘Ming’ the clam, of 507 years. The clam so named as it would have been alive during the Ming Chinese Dynasty
Photo credit: NOAA Photo Library
A very unique jellyfish which can revert back to its premature state when exposed to stress or injury. Whilst this means it is biologically immortal, in practice they don’t live forever and get injured and eaten just like other animals.