I have two at home and one at work. If you can get the Captive bred ones. They do have a big mouth, so expect them to eat small fish/shrimp. I have found that you can get them to eat frozen mysis pretty quickly, but offered them their fill of FW ghost shrimp the frist few weeks. Totally fine with corals. Like to have some caves and stuff to hide in and be comfortable - interestingly, it seems the more places they have to hide the more they feel comfortable not hiding.