🐠 Black Molly – Overview Trait Detail Common Name Black Molly Scientific Name Poecilia sphenops Family Poeciliidae (Livebearers) Origin Central America (Mexico, Colombia, Venezuela) – developed through selective breeding...
| Trait | Detail |
|---|---|
| Common Name | Black Molly |
| Scientific Name | Poecilia sphenops |
| Family | Poeciliidae (Livebearers) |
| Origin | Central America (Mexico, Colombia, Venezuela) – developed through selective breeding |
| Lifespan | 3–5 years |
| Size | Males: ~3 in (8 cm), Females: ~5 in (12 cm) |
| Temperament | Peaceful, social |
| Care Level | Easy (great for beginners) |
Color: Solid, velvety black from head to tail
Body Shape: Oval, slightly flattened
Fins: Short-finned or sailfin varieties available
Sexual Differences:
Males: Smaller, slimmer, with a gonopodium (pointed anal fin)
Females: Larger, with a fan-shaped anal fin
| Parameter | Ideal Range |
|---|---|
| Temperature | 70–82°F (21–28°C) |
| pH | 7.0–8.5 |
| Hardness | 15–30 dGH |
| Tank Size | Minimum 20 gallons |
| Salinity | Optional – can tolerate light brackish water |
Prefer slightly alkaline, hard water
Perform regular water changes (25–30% weekly)
Moderate water flow with good filtration
Live or silk plants help reduce stress and provide hiding spots
Social and peaceful
Do best in groups of 5+
Male-to-female ratio: 1 male per 2–3 females to reduce harassment
Good tank mates:
Guppies, platies, swordtails
Tetras, Corydoras, rasboras, snails
Avoid aggressive or fin-nipping fish like large cichlids or tiger barbs
Omnivore: Prefers both plant and protein-based food
Feed:
High-quality flake or pellet
Vegetables: blanched spinach, peas, zucchini
Frozen/live food: bloodworms, brine shrimp, daphnia
Feed 1–2 times daily in small amounts they can eat in 2–3 minutes
Livebearer: Females give birth to live fry
Gestation: ~28 days
Fry count: 20–100 per batch
Breeding tank or dense plants recommended for fry survival
Fry care:
Feed baby brine shrimp or crushed flakes
Keep separate until large enough to join adults
| Issue | Symptoms | Notes |
|---|---|---|
| Ich (white spots) | White dots, flashing | Treat with heat & medication |
| Fin rot | Fraying, white-edged fins | Caused by poor water quality |
| Fungus | Cotton-like patches | Antifungal medication helps |
| Internal parasites | Weight loss, stringy poop | Use anti-parasitic food/meds |
| Shimmying | Rocking motion | Water imbalance/stress |
Prevention:
Keep water clean
Avoid overfeeding
Quarantine new fish
Hardy and beginner-friendly fish
Thrive in alkaline, hard water
Prefer social groups
Easy to breed; prolific livebearers
Require good filtration and diet variety
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