Researchers Mapped Greenland Shark Genetic Ageing
New genomic and cardiac analyses reveal the biological mechanisms behind the record-setting lifespans of Arctic sharks.
Updated on Sept. 28, 2026 in Life Sciences
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Scientists studying the longest-lived vertebrate species identified genetic features and signs of ageing in Greenland shark hearts as of 2026. This research follows a foundational 2016 study that utilized radiocarbon dating of eye lenses to estimate shark ages.
Why it matters
Understanding how Greenland sharks reach ages of nearly 400 years offers insights into cellular maintenance and longevity that differ significantly from other vertebrates. These findings characterize how extreme, cold-adapted organisms manage long-term oxidative stress and structural cellular damage.
Researchers established a chromosome-level Greenland shark genome in 2026 to identify hallmarks of ageing, including fibrosis, oxidative stress, and damaged mitochondria. These specimens show a characteristically slow growth rate of 1 centimeter or less per year.
The players
Greenland shark
A long-lived vertebrate species inhabiting Arctic and North Atlantic waters with an estimated growth rate of 1 centimeter per year.
The details
The ageing analysis utilized tissue samples from Arctic and North Atlantic populations to observe the accumulation of cellular stress over centuries. By examining nuclei in eye lenses—specialized structures formed during embryonic development that remain stable throughout life—researchers applied radiocarbon dating to track biological milestones. This process allows scientists to assess how these sharks maintain mitochondrial integrity despite living in cold water, often reaching sexual maturity only after 156 years of development.
Timeline
2016: A landmark study published in Science established current shark lifespan benchmarks.
2025: A Canadian assessment highlighted the need for independent validation of age estimates.
2026: Research on shark heart ageing was published in Aging Cell.
2026: A study detailing the Greenland shark genome was published in PNAS.
The Tech Race
This research extends the foundational work established by the 2016 radiocarbon aging methodology for Greenland sharks. It shifts the field from simple demographic dating toward the molecular mechanisms that allow a vertebrate to remain viable for nearly 400 years.
The findings primarily affect marine biology and gerontology researchers who study cellular maintenance and the limits of vertebrate longevity. While there is no direct application for human healthcare currently, the characterization of the Greenland shark genome provides a baseline for future comparative studies on ageing.
The takeaway
The study confirms that extreme longevity in the Greenland shark is tied to specific cardiac and genomic maintenance strategies. Observers should track future comparative genomics research for evidence of similar mitochondrial preservation pathways in other long-lived species.
Further reading
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Source note: This article includes information reported by International Business Times UK.
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