Figure 2. A. Open artificial reefs built of cinder blocks as 

 described in the text. B. Cage control. C. Caged artificial 

 reef. D. Closer view of caged artificial reef, showing extensive 

 algal growth about 3 months after initiation of the experiment. 

 E. Close-up view of fleshy algal growth on the edge of a cinder 

 block in a caged reef. 



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