ranking of animal life span: bowhead whales: over 2 years old; Aleutian: over 2 years old; Water pearl mussel: over 25 years old; Greenland sharks: over 272 years old; Deep-sea tube worms: over 3 years old.

1. Bowhead whale: Over 2 years old

Bowhead whale is the longest-lived mammal, living in the Arctic and subarctic regions. In May 27, researchers captured a sample of a bowhead whale off the coast of Alaska and found a harpoon head made in 1879-1885 on its neck. Based on this, it was estimated that its age at death was between 115 and 13.

Subsequently, the researchers measured other samples of bowhead whales, one of which was estimated to be 211 years old. According to researchers from CSIRO, the genome sequence shows that the maximum life span of bowhead whales is about 268 years.

2. Aleutian flatfish: over 2 years old

Aleutian flatfish is one of the longest-lived fish, and the longest-lived one can live to 25 years old. These pink or brown fish live in the Pacific Ocean from California to Japan. The Canadian Committee on Endangered Wildlife (COSEWIC) estimates that they will grow to 38 inches (97 cm) long and feed on other animals such as shrimp and small fish.

3. freshwater pearl mussel: over 25 years old

freshwater pearl mussel is a kind of bivalve, which mainly lives in rivers and streams in Europe and North America. According to the World Wildlife Fund (WWF), the oldest known freshwater pearl mussel is 28 years old. These invertebrates have a long life because of their slow metabolism. Freshwater pearl mussel is also an endangered species.

4. Greenland sharks: over 272 years old

Greenland sharks live in the depths of the Arctic and the North Atlantic, and are one of the largest shark species in existence. According to the St Lawrence Shark Observatory in Canada, they can grow to 7.3 meters long and feed on marine mammals such as fish and seals.

According to research, the life span of these sharks is at least 272 years, the oldest is about 392 years old, and some of them may even live to 512 years old. There may be some uncertainty in age estimation, but even at the age of 272, these sharks can rank among the longest-lived vertebrates on earth. Scientists say that the important factor of Greenland shark's longevity is its very slow growth rate.

5. Deep-sea tube worms: People over 3 years old

The depths of the cold ocean are a very magical world. There are not only many creatures that are hard to see by ordinary people, but also some of them have amazing life characteristics. A tube worm named Escarpia laminata is one of the best.

A study published in the journal Natural Science in p>217 found that the average life span of this kind of tubular worm living on the bottom of the Gulf of Mexico is over 3 years, and some worms have even survived for more than 1, years, which means that they have taken root in today's habitat as early as the Northern Song Dynasty. Researchers say that adequate food and a living environment without natural enemies can make it grow carefree and help it live longer.