I notice all of the favorites are freshwater. My alltime favorite is the Clown Triggerfish. They are beautiful, have great personalities, and are easy to maintain. My second would be the Moorish Idol. I know they are notoriously difficult to keep, but I was able to keep one in great health and feeding like a pig for over a year when I was stationed in Texas. I sold him to another aquarist when I got order for Germany.