I have a baby crayfish in my tank and he definately eats ghost shrimp. After the other shrimp witnessed this, they all moved to the top of the castle and the plants. LoL. At least I know the shrimp arent stupid.
Updating a little, now both crays are better aclimatized. I've been feeding them with chincks of shrimp, earthworms. Also, I've put some feeder guppies in their tank, and even though I have not seen them catch one, normally there is one or two missing in the morning.
They seem to be doing fine. Hopefully, I will add a cave tonight to give them another hiding place.
That sounds normal... I never actually saw my cray catching fish... I just figured he had to have caught them as there were never any corpses. (Disposing of the evidence! Devious little buggers!)