I was just thinking about what kind of fish I want to put into my 46 gallon bow front. I was planning on a goby to help keep the sand bed stirred up. I had a orange spotted goby in my 55 then he moved to my 125 gallon. I know they do a great job of moving the sand around and they look pretty cool doing it. I have never sen a yellow watchman goby in action. I have seen pictures of them in a burrow. My orange spotted used to dig burrows under the live rock but he also swam around the bottom filtering sand all day. Will the yellow watchman do it also? I also think from pictures that the yellow watchman stays smaller. Is this true? Since I only have a 46 gallon small fish is very imporant to me.