The combination of Space Exploration and Krastorio 2 adds poison to raw fish, so eating them hurts you.
The idea is to force the player to craft med kits
However, I believe this should be optional (ie: I own the server, and the mods I add should act they way I want them to, not the way random mod devs want them to) but it is not an option within those mods.

Could you add support for these fish? From what I can tell, the mods adds a projectile flag to the fish(although my understanding of LUA is limited) so I assume you'd have to strip that flag or something. I don't believe it adds a new type of fish, it simply modifies the existing ones.
The relevant code is here:
https://pastebin.com/raw/sncqVQnZ