I guess I am lucky I came across this thread now, as I was going to put in an order for some yellow clown gobies from J&L. I have 2 green clown gobies (G.histrio ?) that have been a great addition to my reef. They stay in one acropora millepora have nested many many times and always do their deed in the same spot they cleared away each time so the acro is unaffected. They don't nip at polyps and I take a turkey baster and blow in some shredded mysis 3 times a week which they eagerly eat. I guess I will just stick with the gobies I have, or add more of the green ones only...darn...as I really wanted some of those yellow ones
I wouldn't want to think about how hard they would be to catch!