Sydney rock oyster References Sydney rock oyster mollusk Ask Anything Homework Help Also known as: Crassostrea commercialis Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: oyster virginica, the Sydney rock oyster (Crassostrea commercialis) changes sex; born male, it changes to female later in life. It is the most economically important Australian edible oyster. Read More virginica, the Sydney rock oyster (Crassostrea commercialis) changes sex; born male, it changes to female later in life. It is the most economically important Australian edible oyster. Read More