Swordtail

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Swordtail

 

(Xiphophorus helleri), a fish of the family Poeciliidae of the order Cyprinodontidae. It is found in the fresh waters of Mexico and Guatemala. Males are up to 8 cm long, and females 12 cm. The lower part of the male’s caudal fin has the distinctive form of a sword. Swordtails are grayish olive, with a longitudinal red stripe and several shorter reddish bands parallel to it. The females, which are not as brightly colored as the males, are live-bearers. The swordtail is a popular aquarium fish. It hybridizes with the closely related platy (X. maculatus) to form black, red, lemon, mottled red, and other varieties.

REFERENCE

Il’in, M. N. Akvariumnoe rybovodstvo, 2nd ed. Moscow, 1968.
References in periodicals archive ?
We considered 21 ecological variables (biotic and abiotic) for each site: species richness of fish, abundance and biomass of Baja California killifish, biomass-abundance ratio of killifish, abundance and biomass of exotic species of fish, biomass-abundance ratio of exotic species of fish, abundance and biomass of redbelly talapia, abundance and biomass of common carp, abundance and biomass of guppy, abundance and biomass of green swordtail, temperature (degrees Centigrade), salinity (percent), conductivity (microseconds per centimeter), pH, dissolved oxygen (milligrams per liter) and total dissolved solids (grams per liter).
PARASITE-MEDIATED SEXUAL SELECTION OF GREEN SWORDTAILS, XIPHOPHORUS HELLERI
The intent of this study is to perform immune analyses via white blood cell counts from the peripheral blood and spleen of Green Swordtails, Xiphophorus helleri, following an immune initiation, along with parasite level counts of Dactylogyrus intermedius as a means of measuring male fitness.