O yes, do not only keep the eyes open; better buy some pairs! For several reasons: Firstly, opallios is generally very rarely traded, in the whole of Europe (resp. the world)! I don’t know of any import list of recent years that contained this species. One reason certainly is the fact that opallios is a species from Kalimantan (Borneo), and there are generally only few imports from there, ornaticauda, anjunganensis and linkei excluded. Secondly, our last census tells us that opallios has been nearly lost in our aquarium stocks. This should be a strong reason to get hold of some animals now. We must seriously try to alter that and build a strong opalliosbreeding stock!
I very much hope that friends in other European countries place a note here if they find this species on lists there during the weeks to come! As I generally should advice us to tell us at this place about offers of interesting Parosphromenus-species in the different European countries, spec. Sentang and “Blue line” excluded (which mostly means “deissneri”, too. But in case of “deissneri” an exact verification is always advisable. We know of no import of the true deissneri in recent years in spite of many lists containing that name. There was only one import in the whole history of commercial licorice-gourami-imports that really contained that remarkably large and impressive species living exclusively on Bangka!).