Skin the fish, gut and cut into small portions. Chop the onions into small pieces. Grate pickles and carrots, chop olives.
Sweat the onions and carrots in 5 tablespoons of oil, add the pieces of fish and deglaze with a little water. Let simmer for 20 minutes. Add 1 liter of water and all the remaining ingredients (except parsley) and cook for another 15 minutes.
Add parsley and cook for another 5 minutes, season to taste and serve.