Interested to hear from others about their watchman gobies in a fairly large tank. I have one for about a yr and a half now. First week he went down the overflow into my sump where he lived for over a year. I only saw him very seldom in there. A couple months ago I caught him and placed back in the 200g display. Never seen him since. I'm sure he is in there as he was very healthy but its a large tank with a lot of rock to hide under. Just interested if people with similar tanks ever see their watchman goby.