Black Balloon Molly
The Black Balloon Molly, Poecilia sphenops, is a selectively bred variety of the Common Molly prized for its rounded body shape and velvety black coloration. Peaceful, hardy, and active, this attractive livebearer is an excellent choice for both beginning and experienced aquarists. It adapts well to a wide range of water conditions and can be maintained in freshwater or lightly brackish aquariums.
The Black Balloon Molly requires an aquarium of at least 20 gallons with plenty of open swimming space and hardy plants. Dense vegetation provides shelter for fry and complements the fish’s natural behavior. Peaceful in temperament, the Black Balloon Molly is an ideal addition to a community aquarium with other non-aggressive fish.
| Specifications |
|---|
| Species: Poecilia sphenops |
| Size: Up to 2.5 inches |
| Water Type: Freshwater to lightly brackish |
| Temperature: 72–82°F |
| Water pH: 6.5–7.5 |
| Adult Diet: Omnivorous (flakes, pellets, live foods) |
| Lifespan: 5–7 years |
FAQ
What is the ideal tank size for a Black Balloon Molly?
An aquarium of at least 20 gallons is recommended to provide sufficient open swimming space.
Can Black Balloon Molly live with other fish?
Yes, they are peaceful and suitable for community tanks with non-aggressive fish.
What kind of plants are best for a Black Balloon Molly tank?
Hardy, dense vegetation is ideal as it provides shelter for fry and supports natural behavior.

Alison Berry –
Easy to care for and very active in the tank. The black color is striking and the fish stay calm even with other species. I’ve had them for six months and they’re still healthy and thriving.
David Martin –
Great addition to my community tank. They don’t stress other fish and enjoy the plants. A bit shy at first but settle in quickly. Feeding them flakes and occasional live food works well.
James Nolan –
Perfect for beginners. The fish are hardy and adapt well to my tank conditions. I love how they swim in the open space and the black color really stands out.