Unknown Variety
An unknown-variety swordtail is a Xiphophorus hellerii whose color strain or fin type has not been identified with confidence. Swordtails are livebearing freshwater fish from Mexico and Central America, with males carrying the long lower-tail extension that gives the group its common name. Aquarium stocks include green wild-type fish, red, orange, koi, pineapple, neon, black, berlin, hi-fin, lyretail, and simpson forms; mixed fish may show several influences. The label is useful when a fish is recognizably a swordtail but should not be treated as a named strain.
Care matches other swordtails: a covered, roomy aquarium with clean, moderately hard to hard water, steady filtration, open swimming space, and plant cover for females and fry. They are active social fish, and males may pester females or spar, so sex ratios and shelter matter. Females store sperm and give birth to live young, which means unknown-variety fish can quickly produce mixed offspring. Breeders wanting predictable color or fin traits should separate lines and keep clear notes.
Colors: Berlin, Black, Green, Hi-Fin, Koi, Lyretail, Marigold, Neon, Orange, Pineapple, Red, Simpson, Tuxedo, Wagtail, Yellow
