Betta splendens (Allen Green Male Betta)
Betta splendens (Allen Green Male Betta)
Species:
Betta splendens (Allen Green Male Betta)
Growth Form:
Long-finned (typically Halfmoon-type)
Coloration:
Metallic green (emerald to electric green) with possible teal/blue iridescent shifts
Temperament:
Highly aggressive
Tank Size:
Minimum 5 gallons (10–20 gallons recommended)
Placement:
Top to mid-level swimmer
Lighting:
Low to moderate (enhances metallic green sheen)
Flow:
Low (gentle flow preferred)
Diet:
Carnivorous (protein-rich diet)
Feeding:
High-quality betta pellets, frozen/live foods (bloodworms, brine shrimp, daphnia); feed 1–2 times daily
Reef Safe:
N/A (Freshwater species)
Care Level:
Moderate
Betta splendens (Allen Green Male Betta)
Species:
Betta splendens (Allen Green Male Betta)
Common Name:
Allen Green Betta, Metallic Green Betta
Origin:
Captive-bred selectively developed line (Betta splendens lineage, Southeast Asian origin)
Lifespan:
2–4 years (with proper care and stable conditions)
Appearance:
The Allen Green Male Betta is a premium metallic variety known for its rich green iridescence layered over a darker base body. The “Allen line” is typically associated with strong, uniform metallic coverage and high-quality color consistency. Shades can range from deep emerald to electric green, often shifting with hints of teal or blue depending on lighting and viewing angle.
Males usually feature long, flowing fins (commonly Halfmoon or similar types), which amplify the reflective green sheen and create a glowing effect when in motion. The metallic overlay can extend across both body and fins, giving a smooth, polished appearance.
Temperament:
Highly territorial and aggressive toward other male bettas and similarly colored or long-finned fish. Best kept alone or in a carefully planned peaceful community setup.
Tank Size:
Minimum: 5 gallons
Recommended: 10–20 gallons for optimal health, coloration, and stability
Water Parameters:
- Temperature: 24–28°C (75–82°F)
- pH: 6.5–7.5
- Hardness: Soft to moderately hard water
- Ammonia/Nitrite: 0 ppm
- Nitrate: <20 ppm
Stable, clean water is essential for maintaining vibrant green metallic sheen.
Tank Setup:
- Gentle filtration with low flow
- Heavily planted or aquascaped environment
- Driftwood, caves, and broad-leaf plants for hiding and resting
- Dark substrate enhances green coloration and contrast
- Lid required (bettas are known jumpers)
- Low-stress environment with minimal reflections and harsh lighting
Diet:
Carnivorous
Requires a high-protein diet to support coloration and fin health
Feeding:
- High-quality betta pellets as staple diet
- Frozen/live foods: bloodworms, brine shrimp, daphnia
- Feed 1–2 times daily in small portions
- Occasional fasting day recommended to prevent bloating
Tank Mates:
Compatible with:
- Peaceful bottom dwellers (Corydoras, Kuhli loaches)
- Snails
- Select small peaceful community fish (with caution)
Avoid:
- Other male bettas
- Fin-nipping or aggressive species
- Bright or similarly metallic fish that may trigger aggression
Behavior Notes:
- Intelligent and interactive; often recognizes feeding routines
- May flare frequently due to reflective surroundings
- Builds bubble nests at the water surface
- Uses labyrinth organ to breathe atmospheric air
- Enjoys resting near plants or leaves close to the surface
Breeding:
Bubble nest builder species
Male cares for eggs and fry until free-swimming stage
Breeding requires a controlled, separate setup with proper conditioning and pairing
Care Level:
Moderate
Special Notes:
- Metallic green coloration intensifies under stable water conditions and high-quality diet
- Lighting angle plays a major role in how the green iridescence appears
- Stress or poor water quality can dull metallic sheen
- Provide surface resting spots to reduce fin fatigue
- Maintain regular weekly water changes (25–30%) for long-term health and vibrancy

