I'm posting this even though I know what the answer is going to be. I bought a juvenile mystery wrasse and mccosker wrasse at the same time for almost a week they seemed fine almost swimming together it seemed. Then the mccosker disappeared. Just bought another mccosker the other day went into the rocks never came out. Are the mystery wrasse that bad with other flashers? I based my decision on marinecenter.com saying they were compatable with other wrasses. Lot of money wasted