It's a favorite of diving ducks, and of mine. The US lacks tiny European clams and cockles, but we have Cherrystones - small clams.
Clams, shrimp, squid, scallops, mussels. It's the seafood broth that makes it: Seafood Risotto (Risotto ai Fruitti di Mare)
Best idea is to go to an Italian seaport town, and ask for it.