Note that the image taken in the banner is from the Red Sea (NOT the Persian Gulf).
For topside images of beautiful, clean, organized, and surprisingly fun Bahrain, go here.
As is evident from the images below, the nearshore waters of Bahrain are simply too silty to ever be dominated by reef-building corals; these are coral communities at best and probably best called “artificial reefs” since there would be no corals at all were these cement structures never deployed in the first place.
2023-09-23: “Dilmunia Reef” (images from 8-9 m)
2023-09-23: “Artificial Reef” (images 7-8 m)