Which shark species is known for having the longest confirmed lifespan among vertebrates?

The Greenland shark is known for the longest confirmed lifespan among vertebrates.

Radiocarbon dating of proteins in the sharks' eye lenses has indicated lifespans of at least 272 years, with the largest examined individual estimated at roughly 392 years old, plus or minus a substantial margin of error. These estimates make Greenland sharks exceptionally long-lived vertebrates.

They grow very slowly, often less than a centimetre per year, and probably reach sexual maturity only after more than a century. Their slow metabolism suits the cold Arctic and North Atlantic waters where they live, but it also makes populations vulnerable to rapid depletion.

Greenland sharks are usually sluggish and eat a wide range of prey, including fish, seals, and carrion. The lifespan estimates are scientific age ranges rather than exact birth dates, so the species is best described as having the longest documented or estimated vertebrate lifespan, not as having a precisely known maximum age.