Actually yes, – I was about to write that, – that even small, you do see similar behaviour with the licorice gouramies as in many labyrints, – and they are also territorial to some extend. They are small, so agression is seldom fatal, or really I have never experienced it, – but there are always dominant males and also dominant females.
I just had four very young p.parvulus in one small tank together, two males and two females and noticed that they werent really feeling optimal, – some of them staying in the back of the tank, not coming to feed properly and so, looking a bit dull and grey. So I decided to seperate them into two pairs, – and it has taken one day, and the two males are now colouring up nicely, chasing each his female, very eagerly. When together they didnt seem to have the hieraky sorted out. They are very young, but this definitely helped them ‘grow up’ quicker.