Pristella maxillaris

"X-ray fish" redirects here. For Kryptopterus bicirrhis, see Kryptopterus bicirrhis. For the glassfish within family Ambassidae, see Asiatic glassfish.

Pristella maxillaris
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Characiformes
Family: Characidae
Genus: Pristella
Species:
P. maxillaris
Binomial name
Pristella maxillaris
(Ulrey, 1894)
Synonyms[3]
  • Aphyocarax maxillaris Ulrey, 1894[2]
  • Holopristis riddlei Meek, 1907
  • Pristella riddlei (Meek, 1907)

Pristella maxillaris is a species of characin in the genus Pristella, and is commonly known as the X-ray fish or X-ray tetra because of its translucent body.[4]

Description

It is a widely distributed and adaptable fish, found in the Amazon and Orinoco basins, as well as coastal rivers in the Guianas in both acidic and alkaline waters.[5] Unlike most other characins, it is tolerant of (and sometimes found in) slightly brackish water.[6] It is small (up to around 5 cm or 2.0 in in length) and lives in large groups, and males can be distinguished from females by being smaller and thinner than the females. Like most other tetras, it feeds primarily on small insects and planktonic animals.[7]

Nomenclature

Older aquarium books often refer to this species by the junior synonym Pristella riddlei. Aquarists tend to refer to this fish as the golden pristella tetra, though some call it the X-ray tetra, instead. Other common names include goldfinch tetra, a reference to the similarly coloured goldfinch, and pristella tetra, a modification of its Latin name. A common name that was once widespread but is now rarely used is signal tetra, a reference to the similarity between the yellow and black dorsal fin and the arm of a semaphore railway signal.

In aquaria

Pristella maxillaris is a small, adaptable fish that is often kept in a home aquarium and will eat most fish foods. It is tolerant of a range of water chemistry values (pH 6–8; hardness up to 20 dGH). As a shoaling species, it is usually kept in groups of at least six specimens and away from aggressive or predatory tankmates, but is otherwise easily kept in the community tank. The minimum aquarium size is typically 60 x 30 cm (15 Gallons).[citation needed]

References

  1. ^ Taphorn, D.C.; DoNascimiento, C.; Herrera-Collazos, E.E.; Mojica, J.I.; Rodríguez-Olarte, D.; Usma, S. (2021). "Pristella maxillaris". IUCN Red List of Threatened Species. 2021: e.T175969814A175969826. doi:10.2305/IUCN.UK.2021-2.RLTS.T175969814A175969826.en. Retrieved 23 December 2023.
  2. ^ Ulrey, Albert B. (1894). "Preliminary Descriptions of Some New South American Characinidæ". The American Naturalist. 28 (331): 611–612. doi:10.1086/275979. JSTOR 2452600.
  3. ^ "Synonyms of Pristella maxillaris (Ulrey, 1894)". FishBase. Retrieved 6 February 2017.
  4. ^ Froese, R.; Pauly, D. (eds.). "Common name search result". FishBase. Retrieved 2006-12-22.
  5. ^ Froese, Rainer; Pauly, Daniel (eds.). "Pristella maxillaris". FishBase. October 2011 version.
  6. ^ Monks N. (editor): Brackish Water Fishes, TFH 2006, ISBN 0-7938-0564-3
  7. ^ BBC. "Amazing animals - x-ray fish". BBC. Retrieved 2006-12-22.

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