Not only does this mess up the reefs and all the life that depends on it, but also our oxygen supply because we get 70 percent of our oxygen from the ocean. Here is a great website to find sunscreens that are not toxic or any other cosmetic type product. I love this site because it gives ingredients and ratings of the toxins plus consumer ratings. I also should say this is just a site I use, I am not connected to it in any way.
http://www.cosmeticsdatabase.com/