Fin's Fish Guide
The Green swordtail (Xiphophorus hellerii) is a brackish-water fish of the family Poeciliidae that grows up to 14 cm.
Description
The green swordtail is a popular livebearing freshwater fish of the family Poeciliidae, native to Central America. The male is recognised by the sword-like extension of the lower caudal-fin rays. The wild form is greenish with a red-brown lateral stripe; the aquarium trade offers countless red and other colour varieties. The species lives in fast-flowing streams, springs and vegetated canals and is an omnivore feeding on worms, crustaceans, insects and plant matter. Swordtails reproduce by internal fertilisation and bear live young. Populations have escaped or been released worldwide beyond the natural range.
Frequently asked questions
How do you recognise the Green swordtail?
The Green swordtail has a torpedo-shaped body, is mainly green and shows a horizontal stripes pattern. Sword-shaped extension of the tail in the male; ovoviviparous.
Where does the Green swordtail live?
The Green swordtail lives in brackish water and is mostly found around mixed bottom. Atlantic slope of Central America, from Mexico to Honduras.
How big does the Green swordtail get?
The Green swordtail grows to a maximum of about 14 cm. On average the species is around 3 cm.
Is the Green swordtail dangerous to humans?
No, the Green swordtail is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.
Is the Green swordtail edible?
Yes, the Green swordtail is a highly prized food fish.
More photos
Want the complete picture on the Green swordtail?
Point your camera at the fish and Fin names the species in seconds. Free, and the Green swordtail is one of 12,519 species in the app.
All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Xiphophorus
More from the family Poeciliidae
Want the complete picture on the Green swordtail?
Point your camera at the fish and Fin names the species in seconds. Free, and the Green swordtail is one of 12,519 species in the app.