It's possible you would be ok with a ribbon, but the problem is that they can be tricky food wise. I've heard more then a few stories of people who have had issues with getting them to eat anything other then live foods.
I know the feeling, I'm thinking of getting a few of the dwarf morays when I set up my monster 1000gal reef, as the only inverts, other then snails, will be cleaner shrimp as they "tend" to be safe from preds.