🧬 Origins and Classification
Scientific Name: Betta splendens (Mustard Gas variety)
Family: Osphronemidae
The Mustard Gas Betta (Male) is one of the most visually striking Betta varieties available in the aquarium hobby. This Betta comes from selectively bred strains of Betta splendens, originally native to Thailand and surrounding Southeast Asian regions. Breeders developed the Mustard Gas Betta (Male) by enhancing the contrast between its dark body and bright yellow fins. Because of its bold appearance and hardy nature, the Mustard Gas Betta (Male) remains a popular choice for both new and experienced aquarists.
🎨 Appearance
The Mustard Gas Betta (Male) is known for its dramatic color contrast and flowing fins.
Color & Features:
- Deep blue or green body coloration
- Bright mustard-yellow fins
- Long, flowing tail and ventral fins
- Metallic sheen under aquarium lighting
- Compact body with elegant movement
Size and Lifespan:
- Average size: 2.5–3 inches
- Lifespan: 3–5 years with proper care
🏡 Tank Requirements
Tank Size: Minimum 5 gallons recommended for one male.
Water Parameters
- Temperature: 76–82°F
- pH: 6.5–7.5
- Soft to moderately hard water
Environment Setup
They thrives in warm, calm water with gentle filtration. Aquarists should include soft plants, smooth décor, and hiding spots to reduce stress. Avoid strong currents, as long fins make swimming difficult. A secure lid is important because Bettas can jump.
🍽️ Diet
Type: Carnivore
Food Options:
- High-quality Betta pellets
- Frozen or live bloodworms
- Brine shrimp and daphnia
- Occasional protein-rich treats
Feed small portions once or twice daily and remove uneaten food.
🤝 Behavior and Compatibility
The Betta (Male) is territorial but intelligent and interactive.
Compatible Tank Mates:
- Snails
- Shrimp (with caution)
- Peaceful bottom dwellers like Corydoras
Avoid:
- Other male Bettas
- Fin-nipping fish
- Aggressive or fast-moving species
This Betta prefers living alone or in carefully planned community setups.
💡 Care Notes
They requires stable water conditions and regular maintenance to stay healthy. Weekly partial water changes help maintain water quality. Because of its long fins, sharp décor should be avoided. With proper care, the Mustard Gas Betta (Male) becomes a stunning centerpiece and a rewarding freshwater aquarium companion.



