Chiapas swordtail

Xiphophorus alvarezi

Red lateral stripes, blue-green sheen and a black-edged sword.

This male has red longitudinal stripes and blue-green scale reflections. Females are plainer; selectively bred stripe and albino forms are not separate species.

Water temperature: 20–25.6 °C
pH: 7.2–8.1
Hardness: 10–20 dGH

Natural habitat: Inhabits fast-flowing rivers.

Males can reach six inches including the sword. Keep at 68–78°F, approximately 20–25.6°C.

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Appearance and identification

Compared with the spotted nezahualcoyotl, this species has a shallower body and a less prominent dorsal.

Same-species behaviour

Males pursue during feeding. Use a tank at least three feet long.

Diet and feeding

Accepts flakes, small pellets and live food. Offer varied, suitable foods rather than relying on algae.

Compatibility limits

Monitor pursuit and check companion requirements.

Aquarium environment

Allow swimming and retreat space. Plants do not replace water movement, aeration or maintenance.

Sources

www.chicagolivebearer.com ↗ 2026-10-23

www.fishbase.se ↗ 2026-10-25

selectaquatics.com ↗ 2026-10-23