NAMED SUBSPECIES:

Summary: Several subspecies and forms have been named.
Literature: Cohen et al. 1990: Page 47 (text) - "G. morhua includes a number of races that are characterized by size, colour, swimbladder morphology, temperature and/or salinity preferences, migratory behaviour and geographical distribution. Taxonomically named populations include G. morhua callarias, a low salinity, non-migratory race restricted to parts of the Baltic, G. morhua kildinensis, restricted to a small lake on an island near the entrance to Kola Bay, and G. morhua morhua natio hiemalis, a race that migrates in and out of Kandalaksha Bay. [G. m. callarias was originally described as Gadus callarias Linnaeus, 1758; G. m. kildinensis was originally described as Gadus callarias kildinensis Derjugin, 1920].