I have an infestation of these little suckers, I mean infestation covering all sides of my tank. I feel bad for cleaning the glass and killing them. I would rather get something that eats them. I know mandrins eat them. Any other fish eat them.
Red Scooter Dragonets are nice and can be hard to keep but if you've got the food available give it a try. Or the ones from the Philippines, the Ruby Red Dragonets.