This paper considers features of the external morphology and internal structure of the genital system of adult males and females of Metridia longa Lubbock from the White Sea, as well as related with them features of reproduction biology of this mass

Metridia longa (Lubbock) has an annual life cycle in Balsfjorden (69°21'N:19°06'E) with spawning occurring from early to mid-May. Development through copepodite stages I-V takes place during summer. At the end of August copepodite stage V accounted

Bioluminescent proteins are widely used as reporter molecules in various in vitro and in vivo assays. The smallest isoform of Metridia luciferase (MLuc7) is a highly active, naturally secreted enzyme which, along with other luciferase isoforms, is responsible