I have a tiger pistol shrimp and a high fin goby. They don't seem to pair. I put them in the same cave, and in the middle of the night the goby will wonder around and never go back. He will the make his own little place to hide. The pistol shrimp is lonely
. Will they ever pair? The goby knows for sure the pistol shrimp is there and the cave is big enough for both of them.