''Metynnis'' is a genus of serrasalmid fish from tropical and

subtropical The subtropical zones or subtropics are geographical zone, geographical and Köppen climate classification, climate zones to the Northern Hemisphere, north and Southern Hemisphere, south of the tropics. Geographically part of the Geographical z ...

South America. They are herbivorous or omnivorous, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to floodplains,

flooded forest Freshwater swamp forests, or flooded forests, are forests which are inundated with freshwater, either permanently or seasonally. They normally occur along the lower reaches of rivers and around freshwater lakes. Freshwater swamp forests are found ...

s, lakes, pools and reservoirs. They generally reach in

standard length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish m ...

, although a few species may reach up to . The genus contains many of the species known as silver dollars in the

aquarium An aquarium (plural: ''aquariums'' or ''aquaria'') is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aq ...

trade.

Species

There are currently 15 recognized species in this genus: * '' Metynnis altidorsalis'' C. G. E. Ahl, 1923 * '' Metynnis argenteus'' C. G. E. Ahl, 1923 (silver dollar) * '' Metynnis cuiaba'' Pavanelli,

Ota OTA or ota may stand for: Art, entertainment, and media * ''Off the Air'', an Adult Swim television series * Otakon, an annual anime convention in Baltimore, Maryland Electronics, science, and technology * Ochratoxin A (also termed OTA), a mycoto ...

& Petry, 2009 * '' Metynnis fasciatus'' C. G. E. Ahl, 1931 * '' Metynnis guaporensis'' C. H. Eigenmann, 1915 * '' Metynnis hypsauchen'' ( J. P. Müller &

Troschel Franz Hermann Troschel (10 October 1810 – 6 November 1882) was a German zoologist born in Spandau. He studied mathematics and natural history at the University of Berlin, where he was awarded his doctorate in 1834.Beolens, Bo; Watkins, Michael; ...

, 1844) (silver dollar) * ''

Metynnis lippincottianus ''Metynnis lippincottianus'', commonly known as the spotted silver dollar, is a species of serrasalmid native to the Brazilian Amazon and multiple rivers of French Guiana French Guiana ( or ; french: link=no, Guyane ; gcr, label=French Gu ...

'' ( Cope, 1870) (spotted silver dollar) * '' Metynnis longipinnis'' Zarske & Géry, 2008 (silver dollar) * '' Metynnis luna'' Cope, 1878 * '' Metynnis maculatus'' ( Kner, 1858) (spotted metynnis) * '' Metynnis melanogrammus''

, Rapp Py-Daniel & Jégu, 2016Ota, R.P., Rapp Py-Daniel, L.H. & Jégu, M. (2016)
A new Silver Dollar species of ''Metynnis'' Cope, 1878 (Characiformes: Serrasalmidae) from Northwestern Brazil and Southern Venezuela.
''Neotropical Ichthyology, 14 (4): e160023.'' * ''

Metynnis mola ''Metynnis'' is a genus of serrasalmid fish from tropical and subtropical South America. They are herbivorous or omnivorous, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to floodp ...

'' C. H. Eigenmann & C. H. Kennedy, 1903 * ''

Metynnis orinocensis ''Metynnis'' is a genus of serrasalmid fish from tropical and subtropical South America. They are herbivorous or omnivorous, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to fl ...

'' (

Steindachner Franz Steindachner (11 November 1834 in Vienna – 10 December 1919 in Vienna) was an Austrian zoologist, ichthyologist, and herpetologist. He published over 200 papers on fishes and over 50 papers on reptiles and amphibians. Steindachner describ ...

, 1908) * ''

Metynnis otuquensis ''Metynnis'' is a genus of serrasalmid fish from tropical and subtropical South America. They are herbivorous or omnivorous, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to fl ...

'' C. G. E. Ahl, 1923 * ''

Metynnis polystictus ''Metynnis'' is a genus of serrasalmid fish from tropical and subtropical South America. They are herbivorous or omnivorous, and inhabit a wide range of freshwater habitats, ranging from rivers and streams (both fast- and slow-flowing), to floo ...

'' Zarske & Géry, 2008 (silver dollar)

References

Fish of South America Ray-finned fish genera Serrasalmidae Taxa named by Edward Drinker Cope {{Characiformes-stub