Swordtail (Heckel, 1848)
| Scientific Name | Xiphophorus helleri var. |
| Diet | Omnivore: bloodworms, tubifex, brine shrimp; prepared flake, pellets. Some vegetable matter should be offered. |
| Alt Common Name | |
| Family | Poeciliidae |
| Origin | Central America and Africa |
| Aquarist Level | Beginner |
| Community Aquarium Safe | Yes |
| Coloration | Varies |
| Disposition | Peaceful, but males can be aggressive towards one another. |
| Hardiness | Hardy |
| Compatibility | Compatible with Angelfish, Barbs, Brackish Water Fish, Catfish, Cichlids, Danios, Gouramis, Livebearers, Loaches, Minnows, Plecos, Rainbowfish, Tetras. |
| Mature Size | Males to 4 inches, females to 6 inches. |
| Minimum Recommended Aquarium Size | 25 gallons |
| Sexual Dimorphism | Males are smaller in size and are more slender. The gonopodium is the modified anal fin that extends and functions as a sex organ in males. Males have an extension of the lower rear tail fin. |