What are oyster genus?

1. Crassostrea: This genus includes some of the most widely known and commercially important oyster species, such as the Eastern oyster (Crassostrea virginica), the Pacific oyster (Crassostrea gigas), and the Portuguese oyster (Crassostrea angulata).

2. Ostrea: This genus includes the European flat oyster (Ostrea edulis), which is native to Europe and has been introduced to other parts of the world.

3. Saccostrea: This genus includes the Sydney rock oyster (Saccostrea glomerata), which is native to Australia and has been introduced to other regions as well.

4. Magallana: This genus includes the Chilean oyster (Magallana gigas), which is native to South America and has been introduced to other countries for aquaculture.

5. Pycnodonte: This genus includes the Pacific oyster drill (Pycnodonte hyotis), which is a predatory marine snail that feeds on oysters.

These are just a few examples of oyster genus, and there are others as well. Different oyster genus have distinct characteristics and distributions, and they play important roles in marine ecosystems and aquaculture industries around the world.