It doesn’t contain toxic ingredients like: Oxybenzone that kill coral and mute larves, If you also want human friendly sunscreen avoid: Homosalate. Watch the video that will plain in no time what to do or not concerning sunscreen:
Love the reef – Sunscreen from David de Bruijne on Vimeo.
Sorry, but no feeding is allowed in the marine park. The reason is that you won’t be there everyday to feed and the fish can’t take care of them selves if they are fed too often. Aslo the fish have a task in the eco-sysem. By feeding you’ll disrupt the eco-system. So the most simple thing to do is; do not feed.