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The Guardian - UK
The Guardian - UK
Environment

Don’t try this at home! Why there’s nothing better than sharkskin for a good scratch (if you’re a tuna)

A tiger shark being used as a scratching board.
‘Mobile loofahs’ … a tiger shark being used as a scratching board. Photograph: Jakob Ziegler/Getty Images/iStockphoto

Name: Sharkskin.

Age: 420m years or so.

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