Photographs from a colony of boulder brain coral (Colpophyllia natans) found losing tissue in Biscayne Bay, Miami, Florida

Photographs from a colony of boulder brain coral (Colpophyllia natans) found losing tissue in Biscayne Bay, Miami, FL, US. (A). In situ photograph. An area of prior tissue loss is covered in algal overgrowth (O), new loss is evidenced by white, bare skeleton not yet overgrown by algae (S), and intact healthy-appearing tissue is greenish brown (H). Arrowheads indicate diseased tissue margin. (B) Sample of disease margin received. The sample contains an area of bare skeleton (black asterisk), intact tissue (white asterisk), and the disease margin between them (arrowheads).