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        Crown of Thorns Starfish | Life on the Reef

        Learn about population control by rangers who had to solve an outbreak of crown of thorns starfish, in this clip from Life on the Reef. Crown of thorn starfish feed on coral and have caused a forty percent coral loss on the Great Barrier Reef in the last thirty years. Watch Professor Morgan Pratchett discuss the injection he and his team developed that has been used by specialized divers to kill the starfish in the worst affected areas.

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