CONTROL OF CORAL REEFS BY BORING SPONGES 



43 



Fig. 14. Lateral view of an extremely flattened colony of Agaricia grow- 

 ing at a depth of about 30 meters near Runaway Bay, Jamaica. This thin, 

 sheetlike coral was attached to the rock spur in the middle by a slender neck 

 so riddled with borers that gentle pressure from one hand was sufficient to 

 break it off. Sponges can be seen hanging down from the underside of the 

 coral. The large vase-shaped sponge is about 30 cm tall. 



