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Murray cod
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==Description== [[Image:Maccullochella peelii peelii.jpg|thumb|A Murray cod, displaying characteristic mottled green colouration.]] The Murray cod is a large [[grouper]]-like fish with a deep, elongated body<ref name="CadwalladerBackhouse1983"> {{cite book | last = Cadwallader | first = P. L. |author2=Backhouse, G. N. | title = A guide to the freshwater fish of Victoria | publisher = Government printers | year = 1983 | location = Melbourne | isbn = 0-7241-8296-9}} </ref> that is round in cross section. It has a broad, scooped head, and a large mouth lined with pads of very small, needle-like teeth. The jaws of the Murray cod are equal, or the lower jaw protrudes slightly.<ref name=Allen-et-al2002> {{cite book | last = Allen | first = G. R. |author2=Midgley, S. H. |author3=Allen M. | title = Freshwater Fishes of Australia | publisher = Western Australian Museum | year = 2002 | location = Perth | pages = 194β195 | isbn = 0-7307-5486-3}} </ref><ref name="McDowall1996"> {{cite book | editor-last = McDowall | editor-first = R. | title = Freshwater Fishes of south-eastern Australia | edition = Rev. | publisher = Reed Books | year = 1996 | location = Sydney | pages = 158β160 | isbn = 0-7301-0462-1}} </ref><ref name=nfacod> {{Cite web | title = Murray cod | website = Native Fish Australia | url = http://www.nativefish.asn.au/cod.html | access-date = 2007-09-28 | url-status = dead | archive-url = https://web.archive.org/web/20071010105433/http://www.nativefish.asn.au/cod.html | archive-date = 2007-10-10 }}</ref> The spiny [[dorsal fin]] of Murray cod is moderate to low in height and is partially separated by a notch from the high, rounded soft dorsal fin.<ref name=McDowall1996/> Soft dorsal, anal, and caudal (tail) fins are all large and rounded, and are dusky grey or black with distinct white edges.<ref name="CadwalladerBackhouse1983"/><ref name=nfacod/> The large, rounded pectoral fins are usually similar in colour to the flanks. The pelvic fins are large, angular, and set forward of the pectoral fins. The leading white-coloured rays on the pelvic fins split into two trailing white filaments,<ref name=McDowall1996/> while the pelvic fins themselves are usually a translucent white or cream, tending toward opacity in large fish. Murray cod are white to cream on their ventral (belly) surfaces.<ref name=McDowall1996/><ref name=nfacod/> Their backs and flanks are usually yellowish-green to green, overlain with heavy darker green, but occasionally brown or black, mottling.<ref name=Allen-et-al2002/><ref name=McDowall1996/><ref name=nfacod/> The effect is a marbled appearance sometimes reminiscent of a leopard's markings. Colouration is related to water clarity;<ref name=nfacod/> colouration is intense in fish from clear water [[habitat]]s. Small to medium-sized Murray cod from clear-water habitats often have striking and very distinct colouration. Very large fish tend towards a speckled grey-green colouration.<ref name=trueman2007> {{Cite web | last = Trueman | first = W. T. | title = Some Recollections of Native Fish in the Murray-Darling System with Special Reference to the Trout Cod Maccullochella macquariensis | publisher = Native Fish Australia | date = 2007 | url = http://www.nativefish.asn.au/userfiles/files/Recollections_compressed.pdf | access-date = 16 December 2018}}</ref> ===Size=== Murray cod are large fish, with adult fish regularly reaching {{convert|80|β|100|cm|in|abbr=on}} in length. Murray cod are capable of growing well over {{convert|1|m|ft|abbr=on}} in length and the largest on record was over {{convert|1.8|m|ft|abbr=on}} and about {{convert|113|kg|lb|abbr=on}} in weight.<ref name="McDowall1996"/><ref name="Rowland1989"/><ref name="Rowland2005"/> Large breeding fish are rare in most wild populations today due to overfishing.<ref name=kearney&kildea2001> {{Cite book | last = Kearney | first = R. E. |author2=Kildea, M. A. | title = The status of Murray cod in the Murray-Darling Basin. | publisher = Department of Environment and Heritage (DEH) | year = 2001 | url = http://www.environment.gov.au/water/publications/mdb/murray-cod.html | access-date = 2007-10-03 }} </ref><ref name=NSW.Fish.unpubl.data> {{Citation | publisher = NSW Fisheries | title = [unpublished data]}}</ref><ref name=Nicol-et-al2005> {{cite conference | first = S. | last = Nicol |author2=Todd, C. |author3=Koehn, J. D. |author4=Lieschke, J. | title = How can recreational angling regulations meet the multiple objectives for the management of Murray cod populations? | book-title = Management of Murray cod in the MDB. Statements, recommendations and supporting papers. Workshop, 3β4 June 2004, Canberra | year = 2005}}</ref><ref name=Stuart&Koehn2007> {{cite journal | last = Stuart | first = I. |author2=Koehn, J. D. | title = Big cod do breed | journal = Freshwater Fishing Magazine | volume = 85 | pages = 62β64 | year = 2007 }} </ref>
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