Fish Soup With Fennel

1 pound flounder * 1 x fish bones * 1 each bay leaf * 4 each parsley sprigs * 2 each lovage stalks * 6 1/4 cups water cold 1 x sea salt * 6 each black[...]

2 tablespoons olive oil 1 small onion , finely chopped 2 baking potatoes , peeled and cut into 1/2 inch dice 1 small fennel bulb , trimmed, halved lengthwise,[...]