The morfometic indicators of molluscs Mytilus galloprovincialis Lam from mussel farm collectors of b. Martinova (Sevastopol) was investigated. It was shown variability of these signs at small molluscs of black and brown phenotypes and increasing of height to length index to 0,63 - 0,68. The individual copper content in differently size mussel shells was changed from 4 till 8 mkg/g of ashes and did not depend on the phenotypes, sex and size of mollusc.