TIL from this New Yorker article that there are sharks that live to be hundreds of years old:
With the help of a mathematical model that linked size with age, they estimated that one sixteen-foot female was at least two hundred and seventy-two years old, and possibly as much as five hundred and twelve years old. Because it is difficult to establish background carbon-14 levels in the ocean, and because Nielsen and his colleagues didn’t know which part of the ocean the sharks had been born in, the figure was inexact. Still, it firmly established Greenland sharks as the longest-living vertebrates on Earth. In theory, the biggest ones could be nearly six centuries old.