i think i made a huge mistake when i bought one of these at my lfs... its a gold banded sleeper gobie.. i have some shrimp gobies in my other tanks and i like them since they help sift the sand and keep the top layer sturred up.. so in my 75 gallon i thought i would get a bigger version of my shrimp gobies... well he is about 3 inches long and it shifts sand all right.. it will go in the front of my tank get huge mouth fulls of sand an go bout half way up in the water colum and let the sand rain down on my corals like crazy... im starting to hate this fish... it covered my blastos and some of my zoas.. so i tried to move them but it keeps covering my corals up like its funny or something..... not to mention that he dug severial chambers all through and around my rockwork......anyone else had this problem with there sleeper gobies....???