Gravemonera t1_jaavr5t wrote on February 28, 2023 at 2:37 AM

Many species of fish do this, in that the temperature will determine the sex of the eggs. Some fish species will also change sexes depending on environmental pressures. Unfortunately I don’t have sources on this for you at the moment.

redditor50613 t1_jab6af0 wrote on February 28, 2023 at 4:01 AM

When researching how to sex my pseudomugil illuminatus fry, i came across this article, which talks about one person's experience with different temps. https://www.pvas.com/forum/breeder-s-award-program/spawning-report-pseudomugil-luminatus-red-neon-blue-eyes

rogert2 t1_jab8o2e wrote on February 28, 2023 at 4:21 AM

Clownfish are one such fish. Another species is mentioned in the BBC Earth series, but I'm afraid I don't recall the name or even which episode.

paroya t1_jacm0kh wrote on February 28, 2023 at 1:57 PM

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.