Dalmatian Molly
Poecilia sphenops
Dalmatian Molly (Poecilia sphenops) — Easy care, Semi-aggressive, under Livebearer & Killifish. Minimum tank in the app: 24 US gal min; aim for 70–79°F and pH 6.8–8.2. Dalmatian Mollies are suitable for both novice and experienced aquarists due to their hardy nature and vibrant appearance.

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Americas / Africa (varies)
- Africa
- South America
- Central America & Mexico
Regional colours match the stocking calculator’s origin map.
Dalmatian Molly Tank Setup
Focus on a spacious layout with ample swimming room, complemented by vegetation and hiding spots to promote comfort and reduce stress. A gentle water flow mimicking their natural habitat enhances their well-being. Ensure the substrate is soft to prevent injury during foraging, and use moderate lighting to avoid overstimulation.
What Do Dalmatian Mollys Eat?
Dalmatian Mollies are omnivorous and can adapt to various foods, but their feeding speed is moderate, making them susceptible to competition from faster or more aggressive feeders. A varied diet rich in both plant and protein sources will enhance their coloration and overall health.
Dalmatian Molly Tank Mates
Ideal companions include similarly sized, peaceful species that occupy different zones, such as small tetras or rasboras. Avoid aggressive or overly boisterous tank mates, as they may provoke stress or territorial disputes. Maintain a group of at least six Mollies to mitigate intraspecies aggression and promote stable social dynamics.
Are Dalmatian Mollys Good for Beginners?
In App-aquatic we file this under easy care. That still means a cycled tank, realistic stocking, and parameters that do not swing every weekend. Aquarists often underestimate the importance of keeping Dalmatian Mollies in adequate groups, leading to stress and aggression. Failing to provide a suitable environment with enough cover can exacerbate territorial behavior.
Building a community? Run the full list through the stocking calculator before you add anything else.
Log tests and reminders in App-aquatic—free, same data you see here.




