Oysters are typically consumed live, which is a matter of everyday culinary fact and common knowledge requiring no citation.
The claim that oysters are alive when consumed is a well-known culinary reality and direct observation regarding how bivalves are served and eaten. None of the retrieved papers specifically test or evaluate whether oysters are alive at the moment of consumption, as they focus entirely on food safety, pathogens, biotoxins, and environmental contaminants. Therefore, this is common knowledge.