Dry or fruity? Which style of white wine pairs best with simply grilled fish?

About the last place I’d have expected to have an enlightening discussion about food and wine matching is in a fisherman’s shack called Chez Loulou down on the Languedoc coast. Actually I do it an injustice. It’s a restaurant - just - but one that relies for its appeal on fabulously fresh fish rather than fantastically skilled cooking.