Overview

Comprehensive Description

Biology

Maximum length questionable (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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Distribution

Range Description

Known from floodplains lakes in the Solimões River (local name of the Amazon River above its confluence with the Negro in Brazil). There are no reliable records in Peru but the species probably more than likely occurs there (Lima pers. comm. 2007).
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South America: Amazon 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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Amazon River basin: Brazil and Peru.
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Physical Description

Size

Maximum size: 40 mm TL
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Max. size

4.4 cm TL (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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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
H. hyanuary is a benthopelagic (ecological region at the lowest level of water body) species. Occurs in flood plain lakes.

Systems
  • Freshwater
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Environment

benthopelagic; freshwater; pH range: 6.0 - 7.5; dH range: 15
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Diseases and Parasites

White spot Disease. Parasitic infestations (protozoa, worms, etc.)
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Bacterial Infections (general). Bacterial diseases
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2009

Assessor/s
Reis, R & Lima, F.

Reviewer/s
Collen, B., Darwall, W., Ram, M. & Smith, K. (SRLI Freshwater Fish Evaluation Workshop)

Contributor/s

Justification
Assessed as Least Concern due to its sizeable distribution, which is probably wider than known, and the lack of any known major widespread threats.
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Population

Population
This species has a stable population trend at present.

Population Trend
Stable
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Threats

Major Threats
Even if ornamental and as such exploited for the aquarium hobby, the harvest of the species is probably negligible for the species as a whole, considering that the species is probably not harvested in most of its range. It is however a species poorly known in nature.
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Least Concern (LC)
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Management

Conservation Actions

Conservation Actions
There are no conservation measures in place although they are needed.
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Relevance to Humans and Ecosystems

Benefits

Importance

aquarium: commercial
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Wikipedia

Costello tetra

The Costello tetra is a fish from the Amazon basin and is found in Brazil and Peru.[1] The specific name comes from Lake Hyanuary in Brazil. Other common names used in English are January tetra and green neon. The name "green neon" is also used for Paracheirodon simulans.

Water conditions[edit]

In the wild, this fish comes from soft or very soft and slightly acidic water. In an aquarium, some attempt to mimic these water conditions is necessary.

Parameters[edit]

pH of between 6 and 7.5. Hardness of up to 15 degrees of general hardness. Temperature of 23–27 °C (73–81 °F).[2]

Nutrition[edit]

The Costello tetra is an omnivore with a preference for animal foods like small worms, crustaceans and insect larvae. In an aquarium they will eat normal good quality fish flakes readily. They benefit from a variety of food, including live and frozen foods including bloodworms.

Conservation status[edit]

The Costello tetra is a species of least concern with a stable population.[1]

References[edit]

  1. ^ a b c R. Reis & F. Lima (2009). "Hemigrammus hyanuary". IUCN Red List of Threatened Species. Version 2012.1. International Union for Conservation of Nature. Retrieved September 20, 2012. 
  2. ^ Fishbase
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