Since 2003, biologists have tried to get rid of this algae which kills coral reef by using a suction device, but now, they’ve found something better.Sea urchins love eating algae and voracious grazers chew through fragments and metabolize that and be a natural control for the algae.The alien algae were imported to Hawaii in the 1970s for experimental projects but were later abandoned and soon began to spread uncontrollably. But by placing 1,200 urchins on a patch reef in the bay, researchers have seen a significant change over the last year.

See more