Fin's Fish Guide
The Mountain swordatail (Xiphophorus nezahualcoyotl) is a freshwater fish of the family Poeciliidae that grows up to 5 cm.
Description
The northern mountain swordtail is a livebearing toothcarp (Poeciliidae) from Mexico. In the male the lower tail lobe is extended into a 'sword', characteristic of swordtails; the anal fin is modified into a mating organ. Unlike egg-laying fishes the female gives birth to live young. It inhabits fast-flowing mountain streams up to about twelve hundred metres elevation. It feeds on small invertebrates, insect larvae and algae. The species is harmless to humans.
Frequently asked questions
How do you recognise the Mountain swordatail?
The Mountain swordatail has an elongate, eel-like body, is mainly silver-grey and shows a horizontal stripes pattern. Male with a sword-shaped elongated lower caudal lobe; ovoviviparous, from Mexican mountain streams.
Where does the Mountain swordatail live?
The Mountain swordatail lives in fresh water and is mostly found around mixed bottom. Mexico; fast-flowing mountain streams.
How big does the Mountain swordatail get?
The Mountain swordatail grows to a maximum of about 5 cm.
Is the Mountain swordatail dangerous to humans?
No, the Mountain swordatail is harmless to humans. None required: this species is harmless to humans.
Is the Mountain swordatail edible?
The Mountain swordatail is not usually eaten.
More photos
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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 Mountain swordatail?
Point your camera at the fish and Fin names the species in seconds. Free, and the Mountain swordatail is one of 12,519 species in the app.