Usage patterns
〈人〉が牡蠣にあたるto get food poisoning from (bad) oysters
I got food poisoning from raw oysters and had stomach trouble.
牡蠣を剥くto shuck an oyster
The fisherman skillfully shucked the oysters.
牡蠣を養殖するto farm/cultivate oysters
Oysters are farmed in this bay.