i used to have a yellow wrasse, does take care of bristleworms and other stuffs, but once it settled in, will bully smaller fishes, and snatch all the pellets and food since its very fast..
i had a problem catching it out.. even with all the rocks out.. because it hides/sleeps deep in the sand..
but nonetheless a good patrol fish in my opinion.. just take note of its size..
my 2 cents from my limited experience, hope that helps..