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This captivating footage shows an endangered blue-coloured tarantula - considered such a mystery even scientists are scratching their heads.
Bizarre video shows the hairy spider with its distinct navy-blue tint crawling up and down a man's hand before climbing his arm.
According to reports, the creature is a young female Poecilotheria metallica - a critically endangered species of tarantula.
Mystery surrounds why the tarantulas have a blue-coloured hue.
In November 2015, National Geographic reported a team of US researchers set out to solve the puzzle but were left empty handed.