10 Oldest Animals On Earth You Probably Didn’t Know Exist

5. Horseshoe Crab

Age: 440 million years

Horseshoe Crab - oldest animals

Found in shallow ocean waters and muddy water off the coast of Japan and the east coast of North America, the Horseshoe crab are invertebrates, i.e., they lack a spine. Often used as fertilizer and baits, it mates on land and is considered as “living fossils” like Coelacanth and Frilled Shark in our list of oldest species.

4. Nautilus

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