Take the cod and remove the excess parts. Cut it into large squares. Cut the squid into medium slices.
Prepare the sauce for the sauté: clean the carrots and slice them. Do the same with the tomatoes and onions.
Put the ingredients in a saucepan with the oil and cook. Resume cleaning the fish with the mussels.
Dedicate yourself to clams and prawns. Shell and put the mussels and clams aside in a pan to cook with water, oil and parsley.
Add the broth you will get to the sauce that continues cooking. Gradually add the fish starting with the shell-less ones and continuing with cod, squid and baby octopus. Pour the parsley and cook.
Add the mussels, prawns and clams. While the seafood soup is cooking, cut the bread into slices and toast in the oven. Add a few tablespoons of tomato puree in soup and serve the seafood soup with the croutons.