1. Turritopsis dohrnii
The jellyfish Turritopsis dohrnii has no brain and heart and is considered the only immortal creature on Earth; it lives in tropical waters. As scientists have proved, such jellyfish do not die of old age, living up to a certain age, they begin to get younger and return to their original stage. And from the stage of a young individual, she again begins to develop. Fortunately, there is no limit to the number of times they can do this! Thus, a creature can live an infinite number of cycles. Such jellyfish die, most often, due to predators or diseases. Sponges have this incredible longevity thanks to their slow growth and generally cold water environment.
2. Antarctic sponge
The Antarctic sponge holds the record for the longevity of its kind. The creature lives in arctic cold waters. Every year the sponge grows by 0.2 mm, while it lives at a depth of about 200 m, where sunlight practically does not penetrate. By reducing the metabolic process, the Antarctic sponge can live upto 5,000 to 15,000 years.
3. Red Sea Urchin
Next on the list is Red Sea Urchin, a sea creature, which is native to the Pacific Ocean, mostly found along the west coast of North America. These creatures live in shallow areas, mostly near rocky ones where low tides reach 90m. They can also be seen crawling along the ocean floor with the help of their spines. In addition to its size and spines, the giant red sea urchin stands out as one of the longest-living animals, as it can reach up to 200 years.
4. Koi Fish
Koi carps are small ornamental domesticated fish. The oldest fish of the koi carp species died at the age of 226 years in Japan in 1977, on average, these fish live 40-50 years. The homeland of this subspecies of common carp is China, but this fish gained more popularity in Japan, where they are intensively grown. The Japanese gave the name Hanako to one well-known centenarian. At first, koi carps were eaten, later they began to be kept at home as ornamental fish.
5. Giants Galapagos Tortoise
Giant Galapagos tortoises are endemic to the famous Galapagos Islands archipelago and have always been considered one of the longest living creatures on Earth and rightfully so, as they are the vertebrates with the longest lifespan, averaging 200 years. In 2006, a male tortoise named Adwaita died at the age of 255 at Alipore Zoological Gardens of Kolkata. He lived on a diet of wheat bran, carrots, lettuce, soaked gram (chickpea), bread, grass and salt. It is said that this male tortoise weighing upto 250 kg of Algebra species was gifted to Lord Clive, the founder of the British Empire in India. The average lifespan of these tortoises is upto 150-250 years.
6. Lamellibrachia
This is a type of giant tubeworm that is a type of marine annelid (earthworm), which lives on the seabed near hydrocarbons leaking out of the seafloor. Its length can exceed three meters, and the species can live over 250 years.