This is my favourite Fish/Seafood soup. It is tomatoe & wine based. I use Lindeman's Porphyry which is a sweet fruity white wine. It makes the soup quite sweet but I like the balance when you bite into the salty olives. If it's too sweet you can add a good squeeze of lemon or use a white wine that isn't as sweet.
I sometimes add an uncooked crab, cleaned and cut in half