Coral Black Band (image) Max-Planck-Gesellschaft Share Print E-Mail Caption This coral in the Great Barrier Reef is strongly affected by the Black Band Disease. In the lower region the white limestone skeleton is visible, in the upper region the coral tissue is still intact. The BBD zone appears as a black band. Credit Y. Sato Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.