Marigold Swordtail

About the Marigold Swordtail

Marigold Swordtail fish, scientifically known as Xiphophorus hellerii, are a vibrant, tank-bred variety of the common Swordtail, prized for their bright, marigold-like coloration and the distinctive "sword" extension on the male's lower caudal fin. These peaceful, livebearing fish are popular in community aquariums due to their hardy nature and beautiful appearance.

Because this species can get quite large in size (up to 4-5 inches in most captive specimens), it will need greater tank volumes compared to other livebearers. However, like most livebearers, Swordtails are fond of harder water parameters.

Husbandry & Care

Temperament: Peaceful

Minimum Tank Size: 40 Gallons

Water Temperature: 61-82 °F

Water pH: 7.0-8.0

Social Group: Solitary or in a Colony; Ideally stock 2-3 females per male fish to mitigate harassment and courtship attempts

Diet: Omnivorous; Swordtails will readily consume commercial flakes/pellets, live baby brine shrimp or daphnia, algae, and frozen bloodworms/brine shrimp.

Compatible with: This species can coexist with Bristlenose Plecos, Catfish (Corydoradinae), Mollies, and other non-aggressive, fin nipping fish.