Most of the border between the two countries use rivers, so it's certainly possible for a fish to be found in both. However, all the rivers listed as natural habitats (at least the ones I could find) are all in the middle of the country, heading south towards Peru. Plus there is that rather huge mountain range between the rivers in the middle of the country and the rivers that form the border with Colombia. I would hazard a guess that festae coming out of Colombia would be a closely related species rather than the actual thing.