certain swordtail population can do a female to male change later in their life.

medaka (oryzias latipes) have about a 100% male exclusive hatch rate at 34°, starting from 27° and going up from there.

on topic of swordtails, there is a related species (amazon molly) which is unique in that it is the only known stable all-female species, reason so far unknown afaik.

in case anyone wanted to google papers.

if "changed" you mean how we're all dependent on reddit searches for quality information now; and that too is disappearing because facebook groups are taking over the discussion forum and you can't properly search facebook groups nor effectively compile information.