I know!
That is correct.
You see, THIS is where you go wrong (well, one of the places). You think that because something fits your assertions, it is evidence for a global flood and BOOM you win.
well you are a good sport for putting up w me!
But you haven't 'explained' the origin of the reef complex, all you've done is say 'aha, it is shallow water, and there was shallow water before the flood! EVIDENCE!!' Meanwhile, modern geology explains the origins of the reef itself (you haven't), documents and explains the evolution of organisms composing the reef (you haven't), explains the morphology of the reef and associated sediments (you haven't), provides petrographc and geochemical constraints on the diagenetic history of the reef (you haven't), explains why the reef complex died, giving SPECIFIC PROCESSES leading to its demise (you haven't) explains why the reef was preserved (you haven't), explains why the reef was exhumed (you haven't), when it was exhumed (you haven't), and why caves have developed in it since it was exhumed (you haven't).
.