Science reports [sciencemag.org] about a study of Greenland sharks Somniosus microcephalus [wikipedia.org] using carbon dating of shark lenses where the oldest specimen was 392 plus or minus 120 years old i.e. between 272 and 512 years and older than any other known vertebrate. They are also the slowest to reach reproductive maturity at around 156 years old.
The sharks are usually between 2 and 5 meters long but can reach 6 or maybe 7 meters length and have been known to reach a high age ever since it was discovered they only grow 1 centimeter or less each year.