It was sold to me as a diamond goby.....but the markings are much more reddish/pinkish instead of orange......so I'm not 100% sure of the ID.....
"The Orange Diamond Sleeper Goby, a.k.a. Orange-Dashed Goby, is a "Sleeper" Goby that spends its day sifting sand and resting on the bottom. These splendid fish are pale in color with a double row of "diamond" shaped orange spots covering its side. The Orange Diamond Goby likes to use its large head to dig into the substrate and "sift" the sand through its mouth for food, then discarding the sand out its gill coverings. The Orange Diamond Goby will burrow a hole in the substrate that it will use as its home; they make tremendous additions to established reef tanks. These fish are also jumpers, so precautions should be taken to secure openings at the top of the aquarium. Keep only one per tank, and this fish should not be kept with other "Sleeper" gobies or Jawfish."
Personally I believe it to be a Pink and Blue Spotted Watchman Goby (Cryptocentrus Leptocephalus)