I really like my melanarus too...had him over 4 years now...I got a frag a few weeks ago and he ate a giant worm off it that even a dip in Revive did not get rid off.
Plus he is not at all aggressive to any fish...even other wrasse I have...I have seen him bite at a snail...who was upside down and trying to flip with all their fleshy part visible...
But that's about it .