I was thinking a Humu Humu Picasso Trigger, since that is one of the smaller ones, and a moray eel. Not a snowflake, something larger but still small enough. Maybe a ghost eel. I was also thinking about a Valentini Puffer too. So any opinions on those three? I do realize its a bit small for the trigger but only by a few gallons. Would I be able to keep anything else or should I let that be the maximum? Also any comments on fish you particularly like that I could keep in a 55g would be good.