Balloon Molly

Balloon Mollies are a selectively bred variant of the common molly (Poecilia latipinna or Poecilia sphenops), characterized by their rounded, balloon-like bellies and compact bodies. While they are peaceful, colorful, and popular in aquariums, they require some specific care due to their unique body shape and slightly more delicate health.

Balloon Molly – Complete Care Guide

Quick Facts

• Scientific name: Poecilia sphenops (variant)

• Common names: Balloon Molly, Balloon Belly Molly

• Size: 2–3 inches (5–7.5 cm)

• Lifespan: 2–4 years (shorter than standard mollies)

• Temperament: Peaceful, social

• Care level: Moderate (due to body structure)

• Tank level: Mid to top swimmers

• Origin: Captive-bred

Tank Requirements

Tip: Use a secure lid — mollies may jump.

Water Quality

• Regular water changes (25–30% weekly)

• Maintain good filtration to prevent ammonia/nitrite spikes

• Slightly alkaline, harder water is ideal for balloon mollies

‍‍ Behavior & Tankmates

• Social fish — best kept in groups of 3–6+

• Compatible with:

  • Guppies, Platies, Swordtails

  • Corydoras

  • Tetras (peaceful types)

  • Shrimp (if mollies are well-fed)

• Avoid:

  • Fin-nippers (e.g., tiger barbs)

  • Aggressive or large predatory fish

️ Diet

• Omnivores

• Feed a variety for color and health:

  • High-quality flake or pellet food (base diet)

  • Blanched vegetables (zucchini, spinach)

  • Algae wafers

  • Frozen or live foods (daphnia, bloodworms, brine shrimp)

⚠️ Don’t overfeed — balloon mollies are prone to constipation due to body shape.

Special Considerations for Balloon Mollies

Breeding

• Livebearers (give birth to live fry)

• Breed readily in groups with a ratio of 1 male to 2–3 females

• Provide plants or hiding spots for fry

• Adults may eat babies — use a breeding box or separate nursery tank

✅ Summary