Thanks! Lots of good suggestions...as far as fish selection is concerned I will have to think that through. I guess it will depend on the color of the volcano and the lighting. I know there really aren't any volcano fish...i am hoping for an equally exotic look. I hope the tank will be at least 30 gallons, more if the $$ happens.
Maybe a few bala shark would give a dangerous looking affect to the tank. They are one of my favorite fish, next to the zebra pleco. I looked on ebay...yes, they have a nice selection of things but I am having trouble getting my imagination to visualize one in my tank. I will surf for pics of real volcanos to help me get a vision.