Possibly defrost the prawns. Peel carrots, onion and garlic. Wash the carrots, cut them in half lengthwise and cut them diagonally into thin slices. Dice onion, chop garlic finely.
Crush the fennel in a mortar. Wash the fish, dab dry and cut into bite-sized pieces. Shrimps wash, dab dry. Bring 3-4 l salt water (1 teaspoon salt per litre) to the boil.
Heat 2 tablespoons of oil in a frying pan. Fish in it at most 2 minutes all around sear. Season with salt and pepper. Remove. Fry prawns in the frying fat for 2 minutes, season. Remove.
Heat 1 tablespoon of oil in the frying fat. Fry the fennel seeds briefly. Add onion, garlic and carrots and steam for 2 minutes while stirring. Stir in tomato paste, sweat briefly.
Add tomatoes, bring to the boil and simmer for about 10 minutes. Cook pasta in boiling water according to package instructions. Wash parsley, shake dry and cut into strips.
Warm the prawns and fish in the sauce for the last 2 minutes. Season to taste with salt, pepper and sugar. Fold in parsley. Drain the pasta and mix with the sauce.