Top 6 Oldest Animal Species On Earth

Sponge – 580 million years old

Sponges are a special kind of marine animal that look like a plant. They appeared on world oceans before 580 million years ago. There are 5000 different species of sponges in the world. They live in colonies in different depth of the oceans.

Sponges don’t have any internal organs, arms or head. They have a special power to restore the lost body part and new sponge will grow from old one. The body of sponges contains many canals, becomes shelter for many small aquatic animal species.

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