Mary,

   I grew up near Oyster Bay, Long Island, NY during WWII. I don't remember anything, myself, about oystering in blackouts. And many of the older-generation types, like my dad, who'd have a quick answer have passed out of telephone range.

    I do remember oil slicks on the beaches from ships torpedoed offshore. As an adult, I've wondered what their effect was on the shellfish industry. The war felt like a very immediate thing, even to a five-year-old.

    The Flower family, however, who have tended the beds in Oyster Bay for over a hundred years, are still very much involved in the business and might have some tales for you. I'd offer to ask in person, but I don't get "downstate" often there days. Here's a link to the Flowers' website: Frank M. Flower & Sons, Inc.

Hope it helps. - George