Source: Wikimedia Commons
Swordtail
BeginnerXiphophorus hellerii
A livebearer where male tail extends like a sword. Active swimmer adding movement to the tank.
Difficulty
Beginner
Temperature
22〜28℃
Lifespan
3-5 years
Size
8-12cm
Diet
Artificial feed
About
The green swordtail (Xiphophorus hellerii) is a livebearer native to rivers and lakes of southern Mexico, Guatemala, and Honduras. The male's dramatically elongated lower caudal fin — the 'sword' — is the defining feature of the species, historically making it one of the most recognized aquarium fish worldwide. Wild-type males display a green-yellow body with a black horizontal stripe, while selective breeding has produced a vast array of color varieties: red, black, pineapple, and hybrid forms. Males reach 8–12 cm including the sword; females are slightly larger and more robust. Hardiness and adaptability make swordtails excellent beginner fish — they tolerate a wide range of water conditions (pH 7.0–8.0, 22–28°C) and accept most foods. As prolific livebearers, they breed readily in any stable aquarium; in community tanks, adults consume much of their own fry, providing natural population control. Multiple males can become territorial; adequate space reduces conflict. A scientifically notable characteristic of this species is spontaneous female-to-male sex reversal. Swordtails have established feral populations in several countries including Japan.
Source: Wikipedia (CC BY-SA 4.0)
Basic Info
Origin
Mexico and northern Central America
Lifespan
3-5 years
Size
8-12cm
Temperature
22〜28℃
Diet
Artificial feed
Care Guide
Care Specifications
References & Sources
Edited & verified by: br-choku editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Taxonomy & Authority
Accepted name: Xiphophorus hellerii Heckel, 1848
Synonyms: Mollienisia helleri (Heckel, 1848), Poecilia helleri (Heckel, 1848), Xiphophorus brevis Regan, 1907, Xiphophorus guentheri Jordan & Evermann, 1896, Xiphophorus guntheri Jordan & Evermann, 1896, Xiphophorus helleri brevis Regan, 1907
Authority databases: FishBase · GBIF
Nomenclature follows global taxonomic authority databases.
Regulations & Conservation Status
Not CITES-listed
Sources: FishBase / Seriously Fish / CITES Appendices (Checklist)
Regulations may change. Always verify the latest information with the relevant authorities.
Swordtail Listings
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