1. When you see small white balls, they are about to give birth (the shrimps will be out of their sheaths when they turn black or gray!!!)
2. Keep the fish and the Separate the shrimp {I would like to ask if your guppy usually bites the shrimp (that is, when it is not giving birth)? I have tried polyculture of shrimps and lantern fish, and the effect is OK}
3. I hope I can help you, and I wish you success!