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200 million-year-old eel species found

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Footage of the 'living fossil' Protoanguilla palau

A newly discovered species of eel that lives in a cave under the sea has been around since dinosaurs started dominating the planet.

It's got primitive features that are really different from other eels, and researchers have described it as a 'living fossil'.

They say the eel started evolving a massive 200 million years ago.

Even its cave home is between 60 and 70 million years old.