SB Black Molly M – Poecilia sphenops

SB Black Molly M is a popular variant of Poecilia sphenops, admired for its solid jet-black coloration and sleek body shape. The “SB” typically refers to Short Body, giving this molly a slightly more compact and rounded appearance compared to standard mollies.

The “M” size indicates medium-sized specimens, usually active and already showing full coloration. Black Mollies are well-known for their hardiness, adaptability, and constant activity, making them a great choice for both beginners and experienced aquarists.

Their deep black color creates a bold contrast in planted aquariums, especially against green plants or lighter substrates. As livebearers, they give birth to free-swimming fry, adding excitement for hobbyists interested in breeding.

Key Features

• Variant of Molly (Poecilia sphenops)

• Short Body (SB) compact form

• Deep jet-black coloration

• “M” size – medium, active fish

• Hardy and beginner-friendly

• Livebearer species

Size

• Adult size: 5 – 8 cm

• “M” specimens are typically 4 – 6 cm

• Females are larger and fuller-bodied

Temperament

SB Black Molly M is peaceful but active.

• Best kept in groups

• Active mid to upper water swimmer

• Non-aggressive but energetic

• Males may chase females occasionally

Tip: Keep more females than males (1 male : 2–3 females).

Water Conditions

Very hardy and adaptable.

• Temperature: 24 – 28°C (75 – 82°F)

• pH: 7.0 – 8.5

• GH: 10 – 30 dGH

• Ammonia/Nitrite: 0 ppm

• Nitrate: < 30 ppm

Optional: Can tolerate slightly brackish water.

Perform 20–30% weekly water changes.

Tank Setup

SB Black Mollies thrive in planted aquariums.

Recommended setup includes:

• Live plants (also provide fry cover)

• Open swimming space

• Driftwood or simple décor

• Moderate lighting

• Gentle to moderate flow

Minimum tank size: 60–80 liters (~15–20 gallons).

Feeding Habits

SB Black Molly M are omnivores with strong herbivorous needs.

Diet can include:

• High-quality flakes or pellets

• Algae-based foods (spirulina, algae wafers)

• Blanched vegetables (spinach, zucchini)

• Frozen foods (bloodworms, brine shrimp)

Feed 1–2 times daily.

Tank Mates

Ideal for community aquariums.

Suitable tank mates:

• Guppies

• Platies

• Swordtails

• Tetras

• Corydoras

Tank mates to avoid:

• Aggressive fish

• Fin-nipping species

Breeding

SB Black Mollies breed easily.

• Livebearers – produce free-swimming fry

• Gestation period: ~4–5 weeks

• Fry benefit from plant cover or separation

Care and Maintenance

To keep them healthy:

• Maintain stable water parameters

• Provide vegetable-rich diet

• Keep proper male-to-female ratio

• Perform regular water changes

• Ensure adequate space

With proper care, they can live 3–5 years.

Why Choose SB Black Molly M?

• Elegant jet-black coloration

• Hardy and beginner-friendly

• Active and lively behavior

• Easy to breed

• Great for community tanks

SB Black Molly M is a reliable and eye-catching fish that brings contrast, movement, and energy to any aquarium. Its hardy nature and bold appearance make it a favorite for both new and experienced fishkeepers. 🐟🖤🌿✨