The Green Mexican Swordtail fish (Xiphophorus hellerii), also known simply as the Green Swordtail, is a captivating freshwater fish species originating from Mexico and Central America. Renowned for its striking appearance and ease of care, this fish has become a popular choice among both beginner and experienced aquarists.

Characterized by its vibrant and lustrous coloration, the Green Mexican Swordtail boasts shades of green that range from emerald to olive, often shimmering under the light. Its body is elongated with a slender profile, marked by a distinctive, elongated lower tail fin that resembles a sword, hence the name "swordtail."

Both males and females possess differing physical features. Males showcase the characteristic sword-shaped extension on their lower tail fin, which is often longer than their body itself. The females, on the other hand, have a more rounded and broader appearance with a shorter, non-extended tail fin.

Feeding these fish is relatively straightforward, as they readily accept a varied diet. High-quality flake foods, as well as frozen or live foods such as brine shrimp, daphnia, and bloodworms, can be included in their diet to ensure their optimal health and vibrancy.

Breeding Green Mexican Swordtails can be a rewarding experience for aquarists. The females give birth to live fry after a gestation period of about 4 to 6 weeks. To enhance the chances of successful breeding, a separate breeding tank with dense plant cover and some floating plants can be set up. This provides hiding places for the newborn fry and ensures their survival.