Many reefers are getting the "wrong" yellow wrasse for the work of eradicating pest such as Nudi and Worms..
Many are buying Biochoeres chrysus aka the common yellow wrasse, which yes, it also do the work but they grows too big and normally will stop working and wait for food..
The one that I suggest is Biochoeres leucoxanthus aka white belly yellow wrasse, from my experience, they are more inquistive and more active in looking for bristleworm and nudi in betweens the rocks and cervice and on the zoas, it will spend the whole day cruising around inspecting the ground... But his one is a bit more expensive than the common yellow wrasse... And yes, it also eats pellets and mysis..