Including it also doesn't necessarily make sunscreen unsafe.. unless there's some hidden study that we don't all know about.I meant to add this my link for the study above. So there are some other studies such as the one I referenced, but I'll also agree with tbone that a lack of oxybenzone doesn't necessarily make sunscreen "safe."
Sounds like there was one where the folks doing the study added some toxic chemical to oxybenzone therefore invalidating the study entirely, and another by a reputable marine lab but funded by a sunscreen company.
The study including the addition of a toxic chemical concluded that the concoction was dangerous to coral at 100% concentrations. The other concluded oxybenzone was not dangerous to coral. I think in the absence of some actual science showing a problem I've got no more concerns about using normal sunscreen when diving.