Symphysodon tarzoo explained

Symphysodon tarzoo, the green discus, is a species of cichlid endemic to Brazil; specifically, to rivers of the western Amazon Basin upriver from the Purus arch, although it occasionally occurs downstream.^{[1] [2]} An introduced population in the Nanay River is based on stock from the Tefé region.^[3] The green discus is found in blackwater habitats with a high temperature of 27- and low pH of 4.8–5.9.^[3] Although also known from whitewater, its preference for lentic habitats such as floodplains means that the water contain little suspended material (unlike main sections of whitewater rivers).^{[2] [4]}

This species grows to a length of 13.2cm (05.2inches) SL.^[1] S. tarzoo has red spots on the anal fin and body, which separates it from other discus species.^[5]

The scientific name was coined by Earl Lyons in 1959, and the species was revalidated by pattern, morphology and mtDNA in 2006.^{[1] [5]} Later studies have confirmed its distinction, although some suggest the correct scientific name for the green discus is S. aequifasciatus (a name typically used for the blue/brown discus).^{[2] [3]} No natural (wild) hybrids are known between the green discus and its relatives.^{[1] [3]}

Notes and References

1. Ready. J.S.. Ferreira. E.J.G.. Kullander. S.O.. Discus fishes: mitochondrial DNA evidence for a phylogeographic barrier in the Amazonian genus Symphysodon (Teleostei: Cichlidae). 2006. Fish Biology. 69. 200–211. 10.1111/j.1095-8649.2006.01232.x. 2006JFBio..69S.200R .
2. Amado. M.V.. Farias. I.P.. Hrbek. T.. A Molecular Perspective on Systematics, Taxonomy and Classification Amazonian Discus Fishes of the Genus Symphysodon. International Journal of Evolutionary Biology. 2011. 10.4061/2011/360654 . 3147135. 21811676. 2011 . 360654 . free .
3. Bleher. H.. Stölting. K.N.. Salzburger. W.. Meyer. A.. Revision of the genus Symphysodon Heckel, 1840 (Teleostei: Perciformes: Cichlidae) based on molecular and morphological characters. 2007. Aqua. 12. 133–174.
4. Crampton . 2008 . Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae) . Neotrop. Ichthyol. . 6 . 4. 599–612 . 10.1590/S1679-62252008000400008 . free .
5. Web site: New Discus named Symphysodon tarzoo . 2006-11-28 . Matt Clarke . practical fishkeeping . 15 August 2009 . dead . https://web.archive.org/web/20090307162702/http://www.practicalfishkeeping.co.uk/pfk/pages/item.php?news=1145 . March 7, 2009 .