The monograph presents the results of long-term observations of the early ontogenesis of 20 species of gobies inhabiting the Black and Azov Seas. Describes the places and timing of spawning, fertility, mating outfit of males. For the first time, the embryonic development of eight species of gobies (elongated and leopard balds, Knipovich goby, ratan, sirman, black goby, redhead, martovik) is given.