Ostion
Crassostrea gigas
Oysters are marine animals that are often found in brackish habitats. They are very irregular in shape and the valves of some are highly calcified. They belong to the phylum Mollusca.
Oysters are animals that eat algae and other food particles that are usually drawn to their gills. They are known to reproduce through broadcast spawning in warm waters and are also capable of changing their gender.
Some types of oysters are commonly consumed (cooked or raw), and in some locales, they are regarded as a delicacy.