Heat olive oil in a large pot over medium heat. Add chopped onion and minced garlic, sauté until translucent.

Stir in diced tomatoes, fish stock, paprika, salt, and black pepper. Bring to a boil.

Add white fish fillets and shrimp to the pot. Reduce heat and simmer for about 15 minutes until the fish is cooked through.

Garnish with fresh parsley before serving.