This past weekend I bought a baby black rhom (or at least I hope it is) at about 2 inches from azthakid. I threw it in a 10 gallon tank for now until I move into my new place. As soon as I put it in my tank it attacked some feeders I had in the tank. It ripped 2 big goldfish to shreds within a night. It is the most aggressive little critter Ive seen as it attacks my finger through the glass. It is truly a cool fish. I call him Vader.