I have 2 of them and now whenever i stick my hand in the tank they come running to me and practically jump at my hand. I have let them sit there and pick at my hand but my question is, could that be bad for them? Im not exactly there normal customer. I know they eat parasites off fish and i watch them lunge at food when dropped into the tank but I dont want them to eat something off my hand and die. It is cool nun the less. I wish my clown or royal gramma would let the shrimp groom them.