Scientific Name: Xiphophorus Helleri
Ease of Care: Easy
Approximate Arrival Size: 1 to 3 inches
Approximate Full Size: 4 inches
Native Region: Central America
A member of the Livebearer family, the Green Swordtail has very obvious differences between the males and females. The male will have a tubular anal fin, also called the gonopodium. More obvious, the tail will have a long "sword" extension along the bottom edge. This sword can almost equal the body length of the fish. Female Green Swordtails will have a standard rounded tail fin and anal fin. The Green Swordtails prefer open water with cover along the edges of the tank. Male Green Swordtails are sometime intolerant of other males, so they should be kept as a pair, or better yet, as a trio, one male and two females. It is not unusual to see the male dart backward in front of the females and other males as a courtship display or a threatening gesture.