Living Things

Oldest Living Things

1 Cyanobacteria

The oldest living organism on earth is the Cyanobacteria. It dates back 2.8 billion years and has survived every major extinction on earth.

2 Sponge

Sponges are the second oldest organism on earth – dating back almost 600 million years. They have bodies full or pores that allow water to circulate through their bodies.

3 Jellyfish

The jelly fish is the oldest multi-organ on earth and the third oldest organism on earth dating back 550+ million years.

4 Nautilus

The Nautilus is the the only shelled cephalopod, and also the fourth oldest organism on earth going back 500+ million years.

5 Horseshoe Crab

The horseshoe crab is a marine arthopod that dates back 445 million years, making it the fifth oldest organism on earth.

6 Coelacanth

There are two fish in the top ten oldest organisms on earth and one of them is the Coelacanth. Thought to once be extinct, it traces back to 380 million years ago.

7 Ginkgo Biloba Tree

The oldest plant in the world is the Ginkgo Biloba tree. It dates back 270 million years and is the only living representative of the order Ginkgoales.

8 Horseshoe Shrimp

Discovered only in 1955, the horseshoe shrimp is a crustacean that is the eighth oldest organism on earth dating back 200 million years.

9 Sturgeon

The second fish on the Top Ten Oldest Living Things is the sturgeon. This large, plated fish dates back 200 million years. There are both saltwater and freshwater species.

10 Martialis Heureka Ant

The most recently discovered organism on this list is the Martialis Heureka ant species. Found in the Amazon Rainforest, this ant dates back 120 million years.