Yeah. I was actually thinking of rock mounds at either end of the tank in the back corner of the tank for hiding places and looks with the middle of the tank left completely open for just sand maybe some plants in the middle. Kind of figured the CUC would get devoured. Most of what I read said that bamboo sharks will leave CUC's alone if well fed but Stingrays will destroy them no matter what. So i might be replacing my CUC monthly... Or weekly. A Picasso is actually the trigger I was thinking about getting. I love them. Good looking fish and personality to boot. Greatly appreciate the input. Would you recommend against a Picasso in a tank like that? Should I stick with Tangs?