Do your Amano shrimp ever act territorial at all? Do they tend to stay in groups or make their own little places? I have 3 Amano shrimp and one has recently decided that it likes this cave a lot. While the other two stick together in the nook of this driftwood. They used to all hang out together, crammed into the little place in the driftwood but the other one discovered the cave and seems to center around it now.