I'm not sure exactly where to place this, lol.
Sounds like they're girls for 99% of the time. And becoming male is the rarity, since only one per harem can do it. So ignore that bit. They're all female, lol.
From OurBluePlanet:
The majority of “sequential hermaphrodites” are known as “protogynous” (Greek for “female first”): they switch from female to male. This includes the kobudai, other wrasses, many species of parrotfish, and a wide variety of reef fish.