Top 6 Oldest Animal Species On Earth

Nautilus – 500 million years old

Nautilus is a marine mollusk that originated 500 million years ago. That is long before Dinosaurs roaming on Earth. It is estimated that Nautilus is the only surviving member of the large group of shellfish. Nautilus is found in tropical water of Andaman, Fiji and Great Barrier Reef, The live under depth of 2200 feet of ocean. Nautilus also described as living fossil. Nautilus body has many chambered shells. These shells make them look like octopuses. The mouth of Nautilus surrounded by 100 tentacles and have a muscular hood on shells. It will help nautilus to fight against predators.

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