Oysters generally refer to oysters. Oysters and related animals are all marine shells. Suitable for oyster culture in subtropical and tropical coastal areas, widely distributed in China. Oysters can be produced from the Yalu River in the north to the coast of Hainan Island in the south. Oysters are soft-shelled parasitic animals, especially those produced in the freshwater border of Yu Xian.
The main characteristics are: the long oyster is long, the length can reach 35cm, the scales are thick and layered, the quality is hard, the cross section is layered and white, and the taste is slightly salty; However, the oysters near the river are mostly round or oval, and the scales are homomorphic and annular, and they are layered; Oysters in Dalian Bay are triangular, with slightly hard scales and waves. The three shapes are very different and easy to distinguish.
Requirements for the growth environment of oysters:
1. Living in a river near the low tide line to a water depth of about 7m, the suitable salinity is 10% ~ 25%. Omnivorous, feeding on tiny plankton.
2. Individuals inhabiting mudflats and muddy seabed with a depth of more than 65,438+00 meters from intertidal zone to low tide line are usually smaller in normal seawater; Individuals living in low salinity seawater are larger.
3. It inhabits the intertidal zone about 20m below the low tide line and the inlet of rocky reefs, with high salinity, and the breeding period is from June to August.
4. Inhabit on a rock reef with a water depth of about 15 ~ 30m below the low tide line, or on the muddy seabed, sometimes visible several meters below the low tide line.