What fish for my 12 gallon?

[FishFreak]

What fish should I add to my 12 gallon reef? I don't want any perculas becasue that is what is in my 20 gal.

 

Thanks

[gats]

I have a Royal Gramma that I introduced to the tank first. He had the entire tank to himself for three weeks, then I introduced a yellow goby. I really did not think the goby would live the night. The RG has the biggest mouth on her. She established her territory with the goby. Now, they are the best of friends. They even sleep in the same cave. (What do you get when you cross a Goby with a Royal Gramma.........a Royal Goby????).