Warehouse cats can be nice warehouse companions too (depending on what happens in the unit).

I've had to do some mouse removal work in my forest adjacent home, and it's not pleasant, but neither is having mice around.

To be fair, you have to catch and release most fish in the UK which, whilst annoying for the fish, doesn't seem to do them much harm since there's e.g. a whole bunch of 30y+ old carp that keep getting caught.

You're allowed to keep a certain set of game and sea fish if they're big enough and from the appropriate place.