Cacciucco alla livornese

Cacciucco is an Italian fish stew native to the western coastal towns of Tuscany. It is especially associated with the port city of Livorno, in Tuscany, and the town of Viareggio north of it. Cacciucco is a hearty stew consisting of several different types of fish and shellfish; one tradition holds that there should be five different types of fish in the soup, one for each letter c in cacciucco. A wide variety of Mediterranean fish and shellfish may be used, such as red gurnard, armored gurnard, scorpionfish (scorfano), small clams such as littleneck or manila, firm-fleshed fish such as monkfish or other whitefish, red snapper, John Dory, or grouper, mussels, shrimp, and calamari. Traditionalist chefs add a stone taken from the sea to the dish. Crabs, eels, cuttlefish, octopus, bream, mullet, or anything else caught that day might be used.

Source: Wikipedia