Heck, there is an individual animal, a sponge, on the Southern Ocean's seafloor that scientists guess could be as many as fifteen thousand years old, based on how big it is and how slowly it grows.
Heck, there is an individual animal — a sponge — on the Southern Ocean seafloor that scientists guess could be as many as 15,000 years old, based on how big it is and how slowly it grows.