Playing a slime character on the BYOS slime ship, but i replaced the liquid slime with poison, for reasons, and i have poison "water falls" on the ship using pumps/spouts.

But my ship pet is constantly taking that 1 damage tick which is really annoying. I've tried different pets and all seem to have the same weakness. I can't put a collar on it, and if i pokeball it using that option in the menu, it just spawns a new pet.

So is there a way i can remove the ship pet or at very least make it immune to stuff like poison, lava, other liquids etc?
I was genuinely surprised there wasn't a "none" option at the top of the pet list.