Monitoring of the impact of the production activities of oil ports on the water area in general and on the hydrobionts living there, in particular, is a subject of the great attention. Some biological characteristics of the Primorsky scallop, grown by the hanging method at the experimental site in the conditions of the Kozmino bay were studied. Individuals of the same age of different generations were subjected to biological analysis. A comparative study of the size and weight characteristics showed that in the 2016 generation, the average shell height was higher, but the average total mass was higher in the 2015 generation of mollusks, which is due to the uneven growth of the shell of mollusks. Based on the research, it can be concluded that the size and weight characteristics correspond to the standard growth indicators for the scallop of the studied age groups, which indicates favorable living conditions for cultivated mollusks.