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Worldbuilding

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    $\begingroup$ If reading the sources, the gynogenesis of these fishes seems quite stable. Latest studies indicate they exist for over 500.000 generations - which is more than homo sapiens. So is might be a very rare condition, but completely viable even for hard scifi $\endgroup$
    – Falco
    Commented Dec 19, 2023 at 10:51
  • $\begingroup$ @Falco When I say unstable I mean over evolutionary time. It doesn't seem likely to be something that would create a diversity of forms, but rather a curiosity in the bewildering variety of nature. But, yeah, I agree it's a decent justification; it's up the OP to decide how strong a justification they need. $\endgroup$
    – Jack Aidley
    Commented Dec 19, 2023 at 11:02
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    $\begingroup$ @Falco the reason they are stable is because they aren't actually 100% asexual. It's believed occasionally some of the male's DNA manages to get passed on to a child. It's very rare, but even rare sources of novel genes can go along way towards adding some of the adaptability required to survive changes in environment over a purely asexual species. $\endgroup$
    – dsollen
    Commented Dec 21, 2023 at 22:38
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    $\begingroup$ Iirc aother term that will get someone a lot of search hits for this is kleptogenic reproduction .. there are several real species that exist out there that are single sex species and parasitically mate with a member of a close species to reproduce while discarding any genetic input from their mating partner. $\endgroup$
    – Pelinore
    Commented Dec 24, 2023 at 15:23