That's acidity, particularly when you experience it of the sides for the tongue. As we've suggested, a little knowledge goes a long way, and, for many us, it's all we need to be able to fully enjoy our wine experience. Another method to try poaching the fish in the saucepan of wine. https://writeablog.net/clothgym2/cach-tron-ruou-hennessy-ngon-luu-giu-tron-huong-vi