Diamond Goby with Yellow Watchman

[TNTFISHY]

I was a little worried, just because I've never done it, but I added a Watchman into my 57 gallon. The Diamond was in there for about 2 weeks. They are buddy buddy so far(day 2). The Watchman burrowed in right behind the Diamond gobies giant hole. Sometimes they lay next to each other. I wanted to add one more burrowing goby. Too many? Just sharing an experience.