There are a lot of different flasher wrasses that are reef safe and you can get males from several different species and they will "flash" at each other pretty much all day. Beautiful colors and great personalities.
My absolutely favorite fish is the Golden Midas Blenny. Mine has quickly become my favorite fish. They get to about 6" full grown but only require a 30 gal tank or larger. They are a beautiful Golden yellow color, have fantastic personalities and will eat anything you feed them. They swim around most of the day and they will find a favorite hole in a LR and fun to watch them back into their spot. This is usually a place where they can see what is going on in the tank, especially when you are walking up to the tank as they are always ready to eat. Not only all of this but they have a very cute face.
