I had that fish for about 2 years... it was about 9 inches in length. I got it from a LFS as a "MArbled Goby". After a long time researching and seeing them at other stores marked correctly i now know they are the "Jade" or Sleeper" gobies. They are very unusual fish, mine would always, i mean ALWAYS swim vertically , and never horizontally as if the fish was walking. Mine at everything and anything, from feeders, to kril, to bloodworms, to worms, to pellets, to ANYTHING. Mine liked to sift the surface for food by sucking in as much water as it could and filtering out all the food with its gills. I loved this fish was named Goober cuz of how it swam, and i wish i still had it! Good find... I would get another but all the ones i see around now are in BW and i dont want to deal with that...
Josh