03/10/2026
🧽 Sponges — the oldest animals on Earth
The oldest animals on Earth aren’t whales or sharks—they’re sponges.
The sponge in your kitchen sink is named after a real animal. In the past, natural sponges were actually the skeletons of these sea creatures collected from the ocean.
This one is a Stovepipe Sponge from the waters of Curaçao. Each of these giant tubes is at least as big as I am. While some sources say they grow up to 5 feet, I saw many in the 8–10 foot range while diving in Bonaire and Curaçao.
Sponges are animals—not plants—and once they settle on a reef, they stay there for life. And what a life it is: many grow slowly for hundreds of years, and some glass sponges in Antarctica are estimated to be over 10,000 years old, making sponges the oldest animals on the planet.
While diving, I sometimes noticed broken pieces of these sponges lying nearby—likely from accidental kicks by divers. In more untouched sites like this one, I never saw that. One careless kick can destroy hundreds of years of growth, and reefs take a very long time to recover.
Sponges may look simple, but they are incredible and often beautifully unique creatures of the ocean.
Thanks to David Livingston for joining me on this dive and helping me explore some of Curaçao’s hidden underwater gems.