Peel the carrots and parsnips and cut into small pieces. Cut the spring onions into rings and the fennel into small pieces. Cut the pollack into bite-sized pieces.
Heat the oil in a saucepan and sauté the diced vegetables in it. Pour in the water and fish stock, bring to the boil and simmer over a low heat for 20 minutes. Remove half of the vegetable cubes with a slotted spoon and puree the broth with the hand blender. Add diced vegetables, saithe, shrimp and saffron and let it steep for a moment. Season with salt and pepper and serve sprinkled with dill.