I had one for about 2.5 years back in the 90's. I never heard anything back then about them not surviving in captivity, so I didn't know they needed any special consideration.
Back then I was mainly feeding flakes and some pellets. Minimal frozen.
Mine had the cutest habit: I had a dead barnacle in the tank as a decoration and at night the wrasse would curl up in one of the holes, kinda like a cat in a cat bed.
Toward the end, he did change in appearance, with his colors less vibrant and scales more noticable, not skinny, but sort of like turing grey and aging. This could have indicated some nutritional deficiencly, or just age. Obviously with a wild caught fish we don't know their age. That said since 2 of his tank mates from the 90's are still bright and active, I have a hard time believing it was just age.
Kim