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For sexually reproducing planaria: "the lifespan of individual planarian can be as long as 3 years, likely due to the ability of neoblasts to constantly replace aging cells". Whereas for asexually reproducing planaria: "individual animals in clonal lines of some planarian species replicating by fission have been maintained for over 15 years".
Turritopsis dohrnii, also known as the immortal jellyfish, is a species of small, biologically immortal jellyfish [2] [3] found worldwide in temperate to tropic waters. It is one of the few known cases of animals capable of reverting completely to a sexually immature, colonial stage after having reached sexual maturity as a solitary individual.
Although this may be an overestimate, this is likely the longest lived animal on Earth. [64] [65] [66] Specimens of the black coral genus Leiopathes, such as Leiopathes glaberrima, are among the oldest continuously living organisms on the planet: around 4,265 years old. [67] Giant barrel sponges can live more than 2,000 years.
#19 There Are Animals That Can Live Forever. Well, Sort-Of. Immortal jellyfish, along with at least five other jellyfish species, dodge death by hitting rewind. Even after a dead medusa has ...
Hawaiian monk seals grow to be 6-7 feet long, weigh 400-600 pounds, and can live more than 30 years. Males and females are generally the same size — the only way to tell them apart is to look at ...
Longevity in other animals can shed light on the determinants of life expectancy in humans, especially when found in related mammals. However, important contributions to longevity research have been made by research in other species, ranging from yeast to flies to worms. In fact, some closely related species of vertebrates can have dramatically ...
Sloths are beloved everywhere, but without our help they could disappear forever. As the Sloth Conservation Foundation noted, 40 percent of sloths globally are threatened with extinction. This is ...
Small animals such as birds and squirrels rarely live to their maximum life span, usually dying of accidents, disease or predation. [citation needed] The maximum life span of most species is documented in the AnAge repository (The Animal Ageing and Longevity Database). [22]