[ben_w]

Not that I recall — closest I can think of would either be TOS evil twin made from antimatter, the mirror universe in general, or Nelix' coffee.

But I have seen it as a short story about how the world ends, some synthetic bacteria that was meant to be reversed chirality for safety, but eventually it went wild and could eat everything without itself being eaten by anything.

[dmitrygr]

Yes. I remeber that one too. It started with reversed sugar used for weight loss. It was made by reversed ecoli, which escaped.

This is it: https://laprade.blog/your-dietbet-destroyed-the-world

[ben_w]

Yup, that's the one. Thanks :)

[selimthegrim]

If this was ‘Starfish’ it was longer than a short story

[ben_w]

I don't think so; I've looked up the story, and what I remember doesn't match the setting of the summary I've seen of that novel — assuming it was the Peter Watts novel, because while I kinda assumed you wouldn't have meant the Lisa Fipps novel of the same name, there may be others with that name which I just don't know about.