Oysters are shellfish that fall into the mollusk category, which also includes clams, mussels and scallops.
Eastern oysters which are named for their origin-including Bluepoints, Chincoteagues and Lynnhavens-provide most of the oysters in the United States.
Oysters are an excellent source of iron, zinc, selenium, vitamin B12 and vitamin D.
ECO-TIP: Because oysters are filter feeders, their level of contamination will depend on the waters where they were cultivated. Oysters are considered an "Eco Best" by Oceans Alive.
CULINARY CAUTION: Consuming raw or undercooked oysters can cause serious illness including infection with vibrio bacteria or hepatitis virus.