The verdict? Oysters, overall, are in "poor" condition. "They are functionally extinct in that they lack any significant ecosystem role and remain at less than 1 percent of prior abundances in many bays and ecoregions, particularly in North America, Australia, and Europe," the study stated.
Roughly 75 percent of the remaining wild oysters in the world can be found within five North American locations, so that's good news, but maybe that means steering clear of anything that's not a farmed oyster, lest the bivalves vanish completely. Yet another reason to pay attention to sustainable seafood guidelines.