Reef Safe Fish

So I'm looking to stock my reef tank with some fish but I am not sure which kind would be best. I don't want to have to catch any fish once they're in the tank so I wanted to know which would be the safest ones to begin with. At them moment I have 3 green chromis, n2 peppermint shrimp and 1 cleaner shrimp. I plan on adding two black clowns and maybe one more cleaner shrimp. Oh and its a 55g tank btw.
Are there any specific "reef safe" fish or inverts that I should really look out for?

 

look at Aquarium Fish: Tropical Freshwater Fish and Saltwater Fish for Home Aquariums. tell you what is reef safe and what isn't.