I got a hard question. If I get a tiger pistol shrimp to hang out with my watchman goby and I don't have a cave for both of them to hang out will they not be friends? Or will he bring some kind love to my watchman gobay and my fire fish and give them the feeling of security of his presence and all my fish will come hang out in the open? I don't know how that works cause Im debateing on a pistol shrimp which would be cool if my watchman goby comes out more, but if that wouldn't work I would rather get a sexy shrimp. Which one should I get for my tank?