Grey, rough-shelled shellfish sold live. Seafood stalls grill them in the shell with heaps of garlic; they are also fried into omelettes, sun-dried, and boiled down for oyster sauce.
The grilled oysters at this restaurant are delicious.
Tips
usage
In southern China, oysters are more commonly called 生蚝 (shēngháo) or 蚝 (háo), especially in Cantonese-influenced regions. 牡蛎 is the standard/formal term.