hard to keep

Some fish are more sensitive then others to change, or adapting to captive environments. The one I am most proud of is my White Cap Goby, I've had mine for almost 5 years now and am super happy every time I see his little face peek out of the rocks. Do any of you have notoriously hard to keep...

I was just wondering about keeping these types of wrasse. I really like them and feel they would be a great addition to my tank. Just looking at advice at keeping these types of wrasse. At my lfs they don't get them in. He told me they are very hard to keep, but at the time I wasn't looking at...