Actually, I *love* the black background in all my tanks. The colors on the fish show a lot better (though my black and white clown is camouflaged sometimes ). Plus, the black background helps to hide plumbing inside the tank (HOB intake, heater, etc) which are all usually black in color.
I was going to say it was huge if it was a star. I bought some brittle stars before I researched how big the got and one of mine had legs that are about 7 inches long. So it's close to a foot across.
Crazy! That deco is about 4-5" across total, about the size of a Choc Chip Star at the LFS. I keep thinking about getting a starfish but I'm still not sure if I'm going to go reef. I really like starfish but you don't hear a lot of great things about them!!