11. Greenland Sharks
Greenland sharks (*Somniosus microcephalus*) are among the longest-lived vertebrates on Earth, with lifespans estimated to exceed 400 years. (britannica.com) These slow-growing sharks inhabit the cold, deep waters of the North Atlantic and Arctic Oceans, where they grow at a rate of approximately 1 centimeter per year. (aaas.org) Their slow metabolism, adapted to the frigid environment, contributes to their exceptional longevity. (nationalgeographic.com)