Did You Know the Longest-Living Vertebrate on Earth is a Shark?

Hey, ready for a little deep-sea secret that’ll really make you think about time? You know how we talk about ancient creatures, like dinosaurs, and how long they lived? Well, there’s a living creature in our oceans right now that puts almost everything else to shame in terms of sheer longevity, and it’s not even a giant tortoise!

Did you know that the Greenland shark can live for up to 500 years? Yeah, you read that right—five hundred years. That makes it the longest-living vertebrate known on Earth! Imagine that for a second. Some of these sharks swimming around today were born before Shakespeare wrote his plays, before the United States was even a country, and certainly before electricity was a household thing.

They live in the frigid, deep waters of the North Atlantic and Arctic oceans, which is part of their secret. Their extremely slow metabolism, thanks to the cold environment, means they grow incredibly slowly and age at a snail’s pace. They don’t even reach sexual maturity until they’re about 150 years old! Think of what that means for their view of life – it’s like a whole different timescale. While we’re rushing through our decades, a Greenland shark is just entering its awkward teenage phase. It’s a living, swimming testament to how life adapts and endures in the most extreme conditions, quietly witnessing centuries of human history from the cold, dark depths.