Long-Lived Rockfish Show Distinct Genetic Traits
UC Berkeley researchers compared genomes of 88 Sebastes fish in the Pacific Ocean to identify what drives extreme lifespans.
Updated on Nov. 1, 2026 in Life Sciences
Researchers at the University of California at Berkeley analyzed the genomes of 88 Sebastes fish in the Pacific Ocean. Longer-lived fish carried genes associated with repairing DNA damage, along with genes linked to insulin regulation and immune system regulation.
Why it matters
Some species in the genus Sebastes live far longer than most fish, and understanding the genetics behind that longevity offers insight into aging. The findings also suggest that long-lived species may be especially vulnerable to overfishing and climate change because of their lower genetic diversity.
The analysis covered 88 Sebastes fish, a genus with more than 100 species, where some species live 11 years and Sebastes aleutianus can exceed 200 years. The degree to which these genetic findings explain the longevity gap remains unconfirmed.
The players
University of California at Berkeley
A public research university in California whose researchers conducted the genomic study of Sebastes fish.
The details
The large, cold-water seafloor fish were compared on genetic markers, with longer-lived individuals carrying genes tied to DNA repair. Their large size, habitat, and slower metabolism are associated with reduced predator susceptibility.
Timeline
The longevity findings were published on 1 November 2026.
The Big Picture
The study extends comparative longevity genomics beyond mammals into marine fish, where Sebastes species span lifespans from 11 years to over 200. It suggests that the genetic traits behind extreme age may simultaneously raise conservation risk for the same species.
The findings point toward future research on DNA repair and aging that could eventually inform medical work. For now, the results mainly signal that long-lived marine species need protection from overfishing.
The takeaway
Long-lived species often carry hidden genetic vulnerabilities, so conservation planning should account for lifespan as well as population size. Tracking genetic diversity may help identify which fish populations are most at risk.
Further reading
For broader context on how genetics shape living things, explore Life Sciences.
Source note: This article includes information reported by PlusNews.
