The California Sheephead (Semicossyphus pulcher) is characterized by its wrasse-like shape, and three different color patterns for juveniles, adult males, and adult females.
Photographer: Tomás Castelazo
The California Sheephead (Semicossyphus pulcher) is characterized by its wrasse-like shape, and three different color patterns for juveniles, adult males, and adult females.
Photographer: Tomás Castelazo
https://en.wikipedia.org/wiki/California_sheephead
I must have been thinking of the Parrotfish then.