Longest-Living Animals and the Science of Slow Ageing

Some animals barely seem to age. The ocean quahog can live past 500 years, bowhead whales past 200, and giant tortoises well past 100. Their tricks include efficient DNA repair, slow metabolism, low oxidative damage and strong immune systems. Humans can't become tortoises, but researchers are studying these traits to find targets that might slow our own ageing.

1. The Age Champions: A Quick Tour

Ocean quahog (Arctica islandica)

~400–507 years

Typical/record lifespan: Extremely slow metabolism, negligible senescence, stable proteins

Greenland shark (Somniosus microcephalus)

~272–512 years

Typical/record lifespan: Cold environment, slow growth, low metabolic rate

Bowhead whale (Balaena mysticetus)

~200+ years

Typical/record lifespan: Efficient DNA repair, tumour-suppressor adaptations, large body size

Rougheye rockfish (Sebastes aleutianus)

~200+ years

Typical/record lifespan: Negligible senescence, slow growth, deep cold habitat

Galápagos giant tortoise (Chelonoidis niger)

100–170+ years

Typical/record lifespan: Slow metabolism, efficient DNA repair, protective shell, robust immunity

Aldabra giant tortoise (Aldabrachelys gigantea)

150+ years

Typical/record lifespan: Similar to Galápagos tortoise; documented centenarians

Naked mole rat (Heterocephalus glaber)

~30 years (rodent outlier)

Typical/record lifespan: High proteostasis, cancer resistance, stable telomeres, low oxidative stress

Bat in flight at night (Myotis brandtii)

~41 years (tiny mammal outlier)

Typical/record lifespan: Robust DNA repair, anti-inflammatory adaptations, telomere maintenance

2. Tortoises: Our Slow-and-Steady Mascot

Tortoises are the reason this site exists. The Galápagos giant tortoise and Aldabra giant tortoise are among the longest-living vertebrates, with confirmed ages over 150 years and unconfirmed reports beyond 200. Smaller species still impress: radiated tortoises, Hermann's tortoises, Greek tortoises and desert tortoises often reach 50–100 years.

Their longevity comes from a combination of traits:

• Negligible senescence: mortality does not rise sharply with age the way it does in most mammals.
• Slow metabolism: lower energy turnover means lower oxidative damage over time.
• Efficient DNA repair: their cells maintain genomic stability for decades.
• Robust immune defences: they fight infections effectively throughout life.
• Protective shell: physical protection reduces injury and chronic stress.

These traits make tortoises a useful mascot for the tortoise-paced, evidence-led approach to longevity science.

3. Marine Long-Livers: Whales, Sharks and Clams

The ocean is home to some of the most extreme lifespans. The ocean quahog, a small clam, was aged at 507 years by counting growth rings. Its cells are incredibly metabolically inactive, which may protect them from the wear and tear that drives ageing.

Greenland sharks grow only a few centimetres per year in near-freezing Arctic waters. A 2020 study suggested some individuals could be older than 500 years. Cold temperatures slow down biochemical reactions and may reduce the accumulation of cellular damage.

Bowhead whales are mammals, like us, yet they live more than 200 years. Their genomes contain variants linked to DNA repair, cancer suppression and insulin regulation. A 2024 review in Nature Reviews Genetics discussed how comparative genomics of cetaceans is revealing longevity-associated genes.

Relevant papers: Reinke et al., 2022 — Science (comparative biology of ageing); Nielsen et al., 2016 — Science (Greenland shark longevity).

4. Small Mammal Outliers: Naked Mole Rats and Bats

Naked mole rats are the size of a mouse but live up to 30 years — roughly ten times longer than similarly sized rodents. They rarely get cancer, maintain protein quality control into old age, and keep their telomeres stable. Their extraordinary proteostasis has been studied as a model for delaying ageing-related decline.

Long-lived bats such as Bat in flight at night also punch above their weight. Despite weighing only 5–10 grams, they can live more than 40 years. Their longevity is linked to enhanced DNA repair, reduced inflammation and effective management of viral infections.

These species show that lifespan is not simply determined by body size. Small animals can be exceptionally long-lived if they evolve the right cellular defences.

5. What Long-Lived Animals Share

Across species, the same themes keep appearing:

• DNA repair and genome maintenance
• Low oxidative and metabolic stress
• Strong proteostasis (protein quality control)
• Cancer resistance
• Stable telomeres or telomere-independent cell stability
• Efficient nutrient sensing and insulin signalling
• Robust immune and stress responses

These overlap heavily with the 12 Hallmarks of Ageing, the framework biologists use to describe the cellular processes that drive ageing.

6. Human Relevance: Can We Borrow Their Tricks?

Humans are already unusually long-lived for our body size, thanks to evolutionary changes in metabolism, immune function and social behaviour. But we still age. Researchers are asking whether interventions that mimic long-lived animals' traits — boosting DNA repair, lowering chronic inflammation, improving proteostasis — could extend human healthspan.

Promising areas include:

• NAD+ precursors such as NMN and NR, which support DNA repair and mitochondrial function.
• Senolytics like fisetin and quercetin, which clear aged, dysfunctional cells.
• Autophagy activators such as spermidine and rapamycin analogues.
• Mitochondrial support including CoQ10 and various metabolites.

None of these have been proven to replicate animal longevity in humans, but they are active areas of research. Our supplement guides cover the evidence honestly.

8. Medical Disclaimer

The content on this site is for informational purposes only and is not medical advice. Always consult a qualified healthcare professional before starting any supplement or health intervention.