Distribution patterns of live scleractinian coral colonies on vertical faces of concrete blocks were compared
with distribution patterns of environmental parameters known to affect coral recruitment and growth. Coral coverage was
not random across the blocks and among regions of their faces. Variations in colonization did not correspond to
differences in substrate type, illuminance, and water motion intensity. Coral distribution significantly correlated with
blocks location and faces orientation, and these correlations depended on prevailing current direction. These correlations
and dependencies are consistent with the hypothesis that the coral coverage was detrimentally affected by a low quality of
water flow from the local marine port.