Flagtails don't do well in groups

[Cirrus]

I started out with five flag tails in a bare 270 gallon tank. Definite pecking order emerged. I lost one (picked on and chased to death), and then another. i get the point now and am going to sell two of my remaining three and just keep the one. You can see the trio I have left here:

Two are Insignis and one is a Taeniurus, see if you can tell the difference.

 

[Dis]

Nice video. I've seen a video of them in the wild in huge groups of hundreds. They looked really cool.