It helps if you have a dozen or more of these guys. When you have a big group like that, their mentality is something along the lines of "if I don't eat this, the other guy will". Its worked time and time again for me. That's why I tend to buy fish in groups and cherry pick as they grow.
I am completely fascinated by my little group. If I had to I would sell everything else and just keep them. I love Kelberi 

