Strange Leopard Wrasse Behavior

[Stones]

My leopard wrasse did a similar thing a few years ago and I thought it was going to die forsure. However, what ended up happening was the wrasse changed sex from female to male. Prior to this change happening, the wrasse would be missing in action from the display during the daylight hours and when I did briefly see it, the scales were all "ruffled" looking and his slime coat looked milky. Its behaviour was erratic and it didn't want to eat either. It took about 2 weeks in total before he emerged from the sandbed one morning looking as healthy as ever but in the adult male coloration.

Not sure if it would be the same for a potter's wrasse but since it is in the leopard wrasse family, I'd assume maybe this is the case?