Here a picture of fish caught at the km 331 site on road Ruta 26. These large Austrolebias were first described as nioni but Costa classifies them as vazferreirai now. I have bred them since 2009, the last few years with difficulties. Biased sex ratios for a while, last year juveniles killed each other. So it’s down to a few eggs now. Fortunately I am still recovering some eggs from my first peat ever, from 2009.