SAN FRANCISCO— Meet Methuselah, the fish that likes to eat fresh figs, get belly rubs and is believed to be the oldest aquarium fish in the world.In the Bible, Methuselah was Noah’s grandfather and was said to have lived to be 969 years old.... Greenland shark could be Earth’s longest-lived vertebrate In the frigid waters of the sub-Arctic ocean lurks a mysterious and slow-moving beast known as the Greenland shark.... Methuselah’s caretakers believe the fish is female, although it’s difficult