Hi, I have an apricot lobster and it is very easy to keep. they are pretty docile mine lives with minnows ghost shrimp and an albino clawed frog(which are all smaller than him) Hiding spots are optional if you have plants or décor. Mine has hiding spots but is active and walks around the tank most of the time. The only time he has ever gone after anything is when I first got him he tried catching some minnows but I put pellets in front of him and he stopped in his tracks.