I am so glad to see this being discussed; a number of years ago, I dared to suggest that all the stuff we put on our bodies, esp. Sunscreen couldn't be good for coral and I recall being dismissed...while I was not aware of the specific chemical details it sure seemed logical that goopy stuff that clung to our bodies might do the same to live coral, thereby suffocating it. The more we "advance" it seems the more damage we do to ourselves and our environment.