by Merry — It's not news that coral reefs around the world are in trou­ble. One ob­vi­ous symp­tom of this has been the dra­matic in­crease in coral dis­eases start­ing in the 1980s. There is black band and white band, brown band and yel­low band, white pox and white plague, galls and bleach­ing, and…