I had an Orange Spotted Goby, he was more of a "percher" than a sand sifter. Unfortunately he disappeared into thin air somehow. So I went out and bought same kind of Goby that my friend has had for almost a year now. I dont know what kind he is exactly lol, cuz I cant find a pic of him anywhere on the net. But the LFS called him a "Decorative Goby". Anyone ever heard of that? Anyway, he does an AWESOME job on my sand. I've only had him a few days now, my sand is so clean again. Cleaner than when I put it in the tank! lol. It's bright and vibrant!