Octopus larvae are oysters, also known as oysters, commonly known as oysters, oysters and so on. , belonging to mollusks, bivalves and Pinctada, is one of the important marine biological resources available to human beings and a globally distributed species.
Oysters are suitable for breeding in subtropical and tropical coastal areas, and are most famous for their output along the coast of France. China is widely distributed, from Yalu River in the north to Hainan Island in the south, oysters can be produced along the coast, especially at the junction of salt and fresh water. Since BC, people have been raising oysters as food. Oysters are tender in meat, outstanding in umami, fishy and unique in taste. It can be made into soup, pickled, baked and fried, canned, or processed into oyster sauce or dried oyster sauce.
Pearls can be produced in the shell of pearl oyster. The two shells of oysters are different in shape, and the surface is rough and dark gray; The middle part of the upper shell protrudes; The lower shell is attached to other objects, with large volume, quite flat and smooth edges; The inner surfaces of both shells are white and smooth. The two shells are connected at the narrower end by an elastic ligament. There is a powerful adductor muscle in the middle of the shell to resist the tension of the ligament.
Oysters are usually fixed on shallow sea objects or seaside rocks, and feed and breathe by opening and closing shells. As filter-feeding organisms, they mainly feed on micro zooplankton, diatoms and organic debris. Oysters generate airflow in water by vibrating cilia on gills, water enters gills, and suspended particles in water are stuck by mucus. Cilia and tentacles on cheeks classify particles according to their size. Then the small particles are sent to the mouth, and the large particles are transported to the edge of the film and thrown out.