Do they get along?I think I might have both in my tank.I was looking under the tank at the sand bed and seen a pistol shrimp.Then I am almost positive I seen a Mantis under the same rock...They cleared out alot of sand from under the rocks.As soon as they seen the flash light they took off. I hear so many snapping sounds it 's not funny.Sounds like my son is taking 2 cue balls and smacking them together. They are hitchhikers.Never bought a shrimp yet.