ok, I have posted this on a couple of other fish forums and have yet to get any responses of pple with any experience with these fish. my husband got one a week ago. we were at a pet store over an hour away form our home, so we didn't research it before we bought it. we like him and he is very interesting. we have him in a tank on his own right now. we are wondering if and what they can be put in a tank with. we tried him in our 90 gallon with our evil jaguar cichlid, and within 20 minutes of being put in there, he was chasing our jag all over the tank. i am not sure if he could hurt him, but he definitely scared him, and made us too scared to keep him in there. i would love if anyone has had any experience with this fish to give me some info. the only info i have been able to find is scientific, etc. no ones past experiences.