One of the most remarkable records for longevity among vertebrates belongs to the rougheye rockfish (Sebastes aleutianus), a deep-dwelling species that can live over 200 years, making it the longest-lived known fish on Earth. Inhabiting the cold, dark waters of the North Pacific Ocean at depths of 100–900 meters from California to Alaska and beyond, these slow-moving, spiny fish thrive in stable, low-temperature environments that dramatically slow their metabolism and growth rates. Individuals m