Black Marble Swordtail - Xiphophorus helleri

The Black Marble Swordtail is a striking livebearer with a predominantly black body featuring marbled patterns of lighter shades, paired with the male’s distinctive swordtail extension. Hardy, peaceful, and active, this species is ideal for community aquariums and adds bold contrast to any tank.

Description:

Common Names: Black Marble Swordtail

Scientific Name: Xiphophorus helleri

Family: Poeciliidae

Size: 3–4 inches

Temperament: Peaceful

Difficulty: Easy

Native Region:

Originally from Central America, though this strain is captive-bred.

Aquarium Setup:

Tank Size: Minimum 20 gallons

Temperature: 72–82°F

pH: 7.0–8.3

Hardness: Moderate to hard

Decor: Plants, open swimming areas, and hiding spaces

Additional Tips:

• Livebearer: Females give birth to free-swimming fry

• Tankmates: Compatible with other peaceful community fish

• Diet: Omnivorous – flakes, micro pellets, frozen, and veggie-based foods

• Behavior: Active, colorful swimmers that add motion and vibrancy