1. My friend's pregnant CRS isn't fanning much, it just stays on the leave and remains motionless. The pregnant stage is just beginning, can see alot of black coloured eggs. Is this behaviour normal? Why isn't she fanning her eggs?

2. As my friend was concerned "wasting" the eggs in case his tank condition wasn't good for the pregnant shrimp. I shifted the pregnant CRS to my tank, which is well established. Funny thing was that immediately on introducing the pregnant CRS to the tank. The other shrimps sort of attack it. Hmm...never knew that CRS were aggressive. It cannot be that they are terretorial too. Any underlying reason for this behaviour?