The oldest Clam

[WhatKnot]

Ming, the 500-year-old clam, was an ocean quahog clam (Arctica islandica) that lived off the coast of Iceland and was determined to be 507 years old when it was captured in 2006. It is known as the oldest individual non-colonial animal ever discovered, with its age calculated by counting growth rings in its shell.

Unfortunately they opened the clam to count the rings to determine the age and thereby killed the oldest animal on Earth; so the story goes