In this paper, gonadal sex differentiation, structure of testis, spermatogenesis, and spermatozoa of Cynoglossus Semilaevis Günther, and fertilization process of C. Semilaevis Günther and Scophthalmus maximus was studied by means of histological staining mehods and electron microscopy.
In yolk sac stage, primordial germ cells (PGCs) was located between gut and mesonephric ducts; PGCs was migrating towards gentital ridge in larva 5 days after hatching(DAH); in larva 10 DAH, PGCs arrived at germinal...