Submitted by insink2300 t3_11drr8s in askscience
paroya t1_jacm0kh wrote
Reply to comment by Gravemonera in Why does temperature determine the sex of certain egg laying animals like crocodiles? by insink2300
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.
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