The whole process of shellfish culture mainly includes the selection of farms, seedling collection, cultivation, fattening and harvesting and processing. The growth rate of shellfish is gradually decreasing. In order to improve the utilization rate of the sea area, fishing should generally be carried out at an age when the growth rate is obviously reduced, and the time is only a few months to 1 year, such as oyster pleating; Generally 2 ~ 3 years, such as oysters, clams, mussels, etc. ; While that of Pinctada is 5-6 years. The best harvest period is the period before breeding begins every year, and it is also the time when the soft part is the fattest. During harvesting, the fixed or attached species are manually stripped from the attachments, the buried species are dug out together with the sediments to be screened, and the burrowing species can only be dug out from the bottom material.

Since 1970s, some industrialized countries have tried to cultivate shellfish in artificial ponds on land under the condition of serious pollution in coastal waters or lack of shallow beaches, and intensively cultivated oysters by feeding and circulating filtered water system, so that shellfish culture has developed to a completely artificial stage. In addition, the interplanting of shellfish and algae can not only make full and effective use of the site and equipment, but also produce mutually beneficial ecological benefits, such as the interplanting of mussels or scallops with kelp and the interplanting of oysters with laver in China. , so as to achieve the purpose of increasing production. In order to make full use of bait or multi-level utilization, the mixed culture of Malaysian shrimp and granola has achieved good results.