I am going on an old memory but if I am right, when the English, Jamestown settlers first set foot on what is now Virginia Beach, they noted a White couple living in a hut near the beach and living mostly on oysters.
The earliest settlers in the vicinity of Jamestown were Scandinavian or Breton (or both) surveyors working for Spain. Their earliest record in that area is 1598. Same guys were still hard at work at Spanish Hill PA as late as 1616. I can’t imagine them eating oysters since there had been an intense drought in Virginia (NY/PA line on the North, VA/NC line on the South) for a good 70 years ~ 17 more recent of those years having had no rainfall at all.