Percichthyidae) from the Clarence River System, NSW, and M.peelii mariensis, a new subspecies from the Mary River System, QLD. Records of the Australian Museum 45: 121-145. Simpson, R.R. and Mapleston, A.J. (2002). Movements and Habitat Use by the Endangered Australian Freshwater Mary River cod, Maccullochella peelii mariensis. Environmental Biology of Fishes 65: 401–410. Mary River cod Mary River (Queensland) Freshwater fish of Queensland Mary River cod