I have a couple of damsels in my tank. The yellow-tailed blue is the most aggressive fish I have ever owned. SW and FW. If I could catch this thing, it would be out of there and back to the store before it could take another breath. I would never get one of these guys if I were you. Maybe I just have an unusually aggressive damsel, which is one of only two in 46 gallons of water. The other, which maybe I could get some help here, is the most peaceful fish I have ever owned. Model personality but it sometimes too afraid to show it because the YT chases after him so often. The awesome damsel has a more elongated body, all charcoal black, with some bright yellow colorations on its fins. Anyone know what type this is? Anyway, I would have to vote NO for the YT.