Two genetic stocks are considered to exist in the Baltic Sea, assessed and managed separately: the western stock (ICES Subdivisions - SD 22 to 24) is west of the island of Bornholm to the Sound and the Danish Belts and the eastern stock (SD 25-32) is localized east of Bornholm and adapted to brackish waters. A third one is the Kattegat stock (SD 21) (Bagge et al., 1994; Hüssy, 2011). Mixing of the stocks is substantial in subdivision 24 and as the bulk of the eastern Baltic cod stock and catches is concentrated in the southern Baltic Sea (SDs 24 to 26). Since 2015, ICES assessment and advice for eastern Baltic cod include partial catches of the eastern Baltic cod stock in 24, which is part of the western Baltic management area (ICES 2015) (ICES 2019).