Well I have a pistol and it's never done anything to my peppermint or skunk cleaner. Some people have had them kill other shrimp, especially smaller ones, from what I've heard and some people don't like them at all. I don't think it will share a burrow with a jaw fish. Only certain pistols pair up with certain gobies and even if you put the right ones in a tank they might not pair up. My yellow watchman goby and my pistol didn't pair up (When I purchased them, I didnt know only certain species pair with one another) but interesting enough my red serpent star and pistol shrimp share the same burrow with no problems. I don't know why but whatever.