Scientists have discovered a new outbreak of coral disease hitting reefs in Oahu.

A team at the Hawaii Institute of Marine Biology said Thursday nearly 200 colonies of coral in Kaneohe Bay are being threatened by a strain of the disease.

A scientific rapid response team is documenting the outbreak. Residents trained in identifying reef threats are being asked to report any signs of the disease.

The disease, known as Montipora White Syndrome, was first seen in reefs in the area nearly two years ago. The disease is believed to be caused by infectious bacteria and only affects rice coral. Surveys found more than 100 colonies of rice coral died during the first outbreak.