Variable platyfish
An ornamental strain male
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cyprinodontiformes
Family: Poeciliidae
Genus: Xiphophorus
Species:
X. variatus
Binomial name
Xiphophorus variatus
(Meek, 1904)
Synonyms[2]

Platypoecilus variatus Meek, 1904

The variable platyfish (Xiphophorus variatus), also known as variatus platy or variegated platy, is a species of freshwater fish in family Poecilidae of order Cyprinodontiformes. A livebearer, it is native to southern Tamaulipas and northern Veracruz states in northeastern Mexico. It is a popular fish in the aquarium trade due to its prolific breeding, as are hybrids with other members of its genus, most notably the southern platyfish.

Description

The variable platyfish grows to a maximum overall length of 7.0 cm (2.8 in). In the wild, they are olive in colour with black marbling or spots on the side of the caudal peduncle. Large males show blackish blotches on the dorsal fin. Unlike some other members of the genus, X. variatus has no claw at the tip of the fifth anal fin ray. The fourth pectoral ray shows well-developed serrae (saw-like notches). They typically have 20 to 24 lateral scales, 10 to 12 dorsal rays and two rows of jaw teeth.[3] Males exhibit a more pointed or "needle-like" anal fin whereas the female have a more triangular anal fin.

Range and habitat

The variable platyfish is endemic to the Atlantic slope of Mexico from southern Tamaulipas south to northern Veracruz. It is considered uncommon across its range. The species has also been introduced and become established in a number of locales, largely due to releases related to the aquariums trade. In the United States, they have been established in canals along the eastern shore of Tampa Bay, Florida, as well as in Gainesville. They are also naturalised in springs in the counties of Beaverhead, Granite and Madison in Montana.[3][4] The species has been spread to a number of other countries outside of its range, including Colombia, Singapore, and Hong Kong,[1] the latter of which reports a negative impact on native species due to its prodigious breeding.

The fish's habitats include slow-moving waters of vegetated canals, ditches, and warm springs.[3] Omnivorous, its diet includes both plants and small crustaceans, insects, and annelid worms.

Aquarium trade

Male "Tuxedo" variatus platy

The variable platyfish is bred commercially for the aquarium hobby. It is popular due to its often colourful and variable patterns and its ability to survive in cooler waters than other fish; it can comfortably live at temperatures between 16 and 24 °C (61 and 75 °F). The species has also been used in genetic research.

References

Wikimedia Commons has media related to Xiphophorus variatus.
  1. 1 2 Palmer-Newton, A. (2019). "Xiphophorus variatus". IUCN Red List of Threatened Species. 2019: e.T191792A2003290. doi:10.2305/IUCN.UK.2019-2.RLTS.T191792A2003290.en. Retrieved 19 November 2021.
  2. ↑ Froese, Rainer; Pauly, Daniel (eds.) (2019). "Xiphophorus variatus" in FishBase. August 2019 version.
  3. 1 2 3 Page, Lawrence M.; Burr, Brooks M. (1991). A Field Guide to Freshwater Fishes. New York: Houghton Mifflin. ISBN 0-395-91091-9.{{cite book}}: CS1 maint: multiple names: authors list (link)
  4. ↑ Leo Nico (24 May 2019). "Xiphophorus variatus (Meek, 1904)". Nonindigenous Aquatic Species Database, Gainesville, FL. U.S. Geological Survey. Retrieved 9 November 2019.
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