Overview

Comprehensive Description

Biology

Strongly red in nature, but gets pale in captivity. Maximum length reported to reach 4 cm TL (Ref. 1672).
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Distribution

South America: upper Meta River basin.
  • Lima, F.C.T., L.R. Malabarba, P.A. Buckup, J.F. Pezzi da Silva, R.P. Vari, A. Harold, R. Benine, O.T. Oyakawa, C.S. Pavanelli, N.A. Menezes, C.A.S. Lucena, M.C.S.L. Malabarba, Z.M.S. Lucena, R.E. Reis, F. Langeani, C. Moreira et al. … 2003 Genera Incertae Sedis in Characidae. p. 106-168. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 38376)   http://www.fishbase.org/references/FBRefSummary.php?id=38376&speccode=10622 External link.
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Upper Meta River, Colombia.
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Physical Description

Size

Maximum size: 40 mm TL
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Max. size

1.7 cm SL (male/unsexed; (Ref. 38376))
  • Lima, F.C.T., L.R. Malabarba, P.A. Buckup, J.F. Pezzi da Silva, R.P. Vari, A. Harold, R. Benine, O.T. Oyakawa, C.S. Pavanelli, N.A. Menezes, C.A.S. Lucena, M.C.S.L. Malabarba, Z.M.S. Lucena, R.E. Reis, F. Langeani, C. Moreira et al. … 2003 Genera Incertae Sedis in Characidae. p. 106-168. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 38376)   http://www.fishbase.org/references/FBRefSummary.php?id=38376&speccode=10622 External link.
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Type Information

Paratype for Axelrodia riesei Gery
Catalog Number: USNM 207924
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): H. Axelrod & Riese
Year Collected: 1964
Locality: East of Villavicencio, Upper Rio Meta Basin: Colombia, Meta Department, Colombia, South America
  • Paratype: Gery, J. 1966. Ichthyologica; The Aquarium Journal. 37 (3): 112, figs 1-5.
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Holotype for Axelrodia riesei Gery
Catalog Number: USNM 207923
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): H. Axelrod & Riese
Year Collected: 1964
Locality: East of Villavicencio, Upper Rio Meta Basin: Colombia, Meta Department, Colombia, South America
  • Holotype: Gery, J. 1966. Ichthyologica; The Aquarium Journal. 37 (3): 112, figs 1-5.
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Ecology

Habitat

Environment

benthopelagic; freshwater; pH range: 7.0; dH range: 8
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Conservation

Threats

Not Evaluated
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest; aquarium: commercial
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Wikipedia

Ruby Tetra

The ruby tetra, Axelrodia riesei, is a species of freshwater fish in the family Characidae. It is found in the Río Meta, Colombia, South America. In nature, it has a natural red colour, but this is somewhat lessened in captivity. Ruby tetras grow up to 4 cm (1.6 in) long.

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