I have a pink spotted watchman goby and he is doing great...wanted a yellow, but the guy wouldnt sell it as it was in his display tank. The spotted is fun to watch too, we call him the grumpy old man because of his expression.
I want one too,and I too do not want to see him die a agonizing death.I have about 40 lbs of live rock in my 30 gallon Tank has been set up for about 8 months.I also have live sand too.The only thing in the tank,is my tomato clown.
I would probaly do two if they are being kept together now. I have had a couple...but it was only one at a time , I assume you can find pairs. What would be really cool, is if you can find out what shrimp is associated with them and get one of those too.