Played Subnautica 1 and 2 and never went out of my way to kill creatures, but...
If they're committed to the no-kill rule, Subnautica 2 really needs a way to get aggressive creatures to fuck off for more than 10 seconds.
Some little bastards (looking at you, Sitaray) will just continually attack you or your submarine about every 5 seconds. You can throw a flare or bop them with your sonic resonator to stun them for a few seconds but if you have to do anything in the area it becomes extremely tedious having to stop everything to tell the shark to politely piss off again and again. They will stop at nothing, ignoring all prey species or the fact that your sub is inedible, just to whittle your ship's hp down
I'm not gonna mod the game to kill fish but some sort of sonic or electromagnetic deterrence field would be really nice.



in games but I found it to be a fun challenge in the first one.