They are like a penguin in that the bottom of the tail is black and the top is clear. They have grown from 2" to 4" in a couple of months (top picture). I would like to know how big they may get. Also there is an imposter in the group. It's tail is clear and the bars are different (next 3 pictures). They are very fast and hard to photograph. The last picture shows them with some Hypselobarbus jerdoni and a red head geo. Any information would be appreciated.
