Animal Kingdom Which animal has a 1000 year lifespan? March 4, 2026 by Tanp | Leave a Comment While no single animal is definitively proven to live for a full 1000 years, the ocean quahog (Arctica islandica) is the closest contender, with some individuals estimated to be over 500 years old. This remarkable bivalve mollusk holds the record for the longest-lived non-colonial animal known to science. Unveiling the Secrets of Extreme Longevity: Which […] Read more ยป