A two-shelled mollusk. Their exterior shell is rough and typically gray/brown. The animal inside is edible; it has a salty aroma and a briny, sweet flavor.
Oysters can be found in oceans all over the world.
Oysters have been cultivated as food for more than 2,000 years..
“Oysters from Encyclopedia Britannica https://www.britannica.com/animal/oyster
“Oysters” from Seafood Health Facts https://www.seafoodhealthfacts.org/description-top-commercial-seafood-items/oysters