That's acidity, particularly when you experience it along at the sides on the tongue. As we've suggested, a little knowledge goes some way, and, for many us, it's all we need as a way to fully enjoy our wine experience. Another way is to try poaching the fish in a saucepan of wine. http://WWW.Hondacityclub.com/all_new/home.php?mod=space&uid=776029