The Blue throat is not the only Trigger that can be kept in a reef tank. The CrossHatch (although rare), Sargasum, GoldenBack, and the Hawaiian Black trigger are all reef safe but most of them might eat your ornamental shrimp. Some sites show the Hawaiian black Trigger as not being reef safe so I am not sure about that one. I ordered a Black since I couldn't find a Crosshatch so i will let you all know if it's reef safe.