Long story bout that here's the short version lol...... I brought 3 that were called double stars (which I thought would be bulu points) from a shop cause that was all they had and each 1 looks different from each other so only have 1 pemba/bemba. Seem to do well with duboisi but generally speaking black sp. are more agressive and are suppose to produce more babies than duboisi when in the same tank with same numbers, thats what I have read anyway.