My LFS is showing me a paired Amblyeleotris randalli (Randall Goby) and an Alpheus bellulus(pistol shrimp) . I have seen the pair and watched the symbiotic relationship and it would be a cool addition to my 240 Gallon . The sand bed is average 2.5-3" deep. I have a 4" Opistognathus rosenblatti (Blue-Dot Jawfish). I am concerned with any issues the Pistol shromp will have with any of my fish. I understand they may go after a snail now and then. But is it likely they will bother other fish, including the Blue Dot. I have seen videos of them capturing other reef inhabitants. Can any one share their experience or expertise?