What makes wrasse change into males is it size or age?
My wrasse has no grown very much lately (ive had it for a year, 3+ inches), I am waiting for it to change colors. Does it have to grow for this to happen?
For most fairy and flasher wrasses it takes several females to be in the tank with it for it to turn to the "supermale" coloration. They are normally associated with a harem of several females in the wild. Often even if you buy the fish as a supermale it will lose the coloration if you don't keep several female wrasses of the same species in the tank with it.
What spurs sex change is almost always social conditions more then anything else. In protogynous hermaphrodites (female first), its the absence of a male that will cause the dominant female to change. If there is only one specimen, this change will more then likely not occur. In protandrous hermaphrodites (male first), the dominant male will change to a female. Clownfish are protandrous hermaphrodites and unlike protogynous hermaphrodites (wrasses, etc.), even solitary specimens will change to females.
