Im tearing down my 28g and rebuilding it so I toke my 5 kuhli loaches, 2 upside down catfish, 1 clown pleco & 1 honey Gourami and added them to my 55g with my ghost shrimp and a few other species and now my shrimp don't move around alot they are just chilling in the plants mostly. They were fine for the first few days but that changed a couple days ago. The recently added fish will be going back to the other tank probably in a week or two.
They're a prey animal and are probably reacting to the presence of new predators. I have found they will lay low for a couple of days until they feel comfortable and start coming out more, that is, unless someones actively trying to eat them.
I don't think anyone is hunting them.... atleast I hope not. I would like them to come back out and be fun again.
When I went from my 37 to 55 the ghost shrimp did what Matt said, hid for a few days before coming out all the time now.
