Something has gained my attention before, and my impression has been confirmed when I got two new paro pairs of different species some days ago:
I reported about my 4 paros (Thread “New paros at my home”) I received from trade which all came out to be females. Due to this it is not possible to determine form or species. What attracted my attention was the fact that all four individuals never (and I mean never!) show this slowly swaying up and down along the axis of the eyes which is so typical.
Watching my new paros confirmed this observation: P. nagyi, pahuensis, quindecim – all show this slow seesawing movement, even in this short time I have them. I think the females do it a bit more often than the males. But I have never seen one of the four single “girls” doing this.
Now – is it a behaviour typical only for some species/ forms? Or is it a behaviour only shown when different sexes are together?
Some of you also have only males/females of certain species – have you observed the same? Do your fish all show the seesawing movement – no matter if the different sex is around?