Abstract: The carbon sequestration of marine shellfish and seaweed cultures is an important part of fishery carbon sequestration. The assessment of carbon sequestration in marine shellfish and seaweed cultures is beneficial for realizing the purpose of carbon neutrality in China. The scale and output of marine culture of Fujian Province are in forefront of the country, therefore, it is of great significance for the study of carbon sequestration in Fujian. Using the data of the Chinese Fisheries Statistical Yearbook published from 2015 to 2020, we evaluated the carbon sequestrations and its potentialities in Fujian Province and China from 2014 to 2019, respectively. The results indicated that the carbon sequestration of Fujian Province accounted for a large proportion and it increased significantly yearly. Impressively, the estimated carbon sequestration strength in 2019 was up to 2.113 million tons, accounting approximately for 31.15% of the total of the whole country. Compared with the annual growth rate of the country (about 0.173 million tons per year), the annual growth rate of marine cultivated shellfish and seaweed carbon sequestration in Fujian Province is approximately 0.107 million tons per year, which indicated that Fujian Province has strong potentiality of carbon sequestration in marine culture. It is optimistic that the marine culture of shellfish and algae in Fujian Province could bring considerable economic benefits for the reduction of carbon emission and make an important contribution to realizing the carbon neutralization in China.