japanese oyster: a large oyster native to Japan and introduced along the Pacific coast of the United States; a candidate for introduction in Chesapeake Bay
oyster: marine mollusks having a rough irregular shell; found on the sea bed mostly in coastal waters
ultimate frisbee: a game between two teams whose players try to toss a Frisbee to one another until they cross the opponents goal; possession changes hands when the Frisbee is intercepted or touches the ground or goes out of bounds