Catpicklesdog
Hindsight is a wonderful thing!
What other tankmates do you have? It could be that he's getting agitated with lack of swimming space and picking on the easy targets. Although a Mandarin has a slime coating which is supposed to have a foul taste, it won't stop the wrasse from having a go at him. My mandarin leapt out of my tank to get away from my wrasse. In the end I got rid of my wrasse.
