No Crabs on the 15th

As regular readers probably know, dungeness crabs are on the menu every November 15 for the start of the Nativity Fast. This year, though, the opening of commercial crab season has been delayed and the newspapers are saying there won't be any crabs in the markets on on the 15th. So, this year, for the first day of the fast I am thinking about oysters or maybe, since the 15th is fish day this year, I'll make grandfather's cioppino but substitute other fish and crusteaceans for the crab. That is, if I have a kitchen to work in.