Origin
Domesticated from Southeast Asian populations of Betta splendens, particularly from Thailand, Cambodia, and Laos. Halfmoon tails were developed through generations of selective breeding.

Visual & Behavioral Appeal
Known for their dramatic, fan-like caudal fin that spreads a full 180° when flared. Colors range across every hue, often iridescent. Slow-moving and visually elegant, but males are highly territorial.

Purpose
Serves as a dramatic visual centerpiece in nano tanks or calm aquascapes. Their flaring behavior adds interactivity, and their presence can anchor the composition of a tank.

Importance
Ideal for aquarists seeking an interactive, ornamental fish. The Halfmoon variety is a staple in Betta competitions and prized for its symmetry and finnage.

Included Resources
Requires calm water, gentle filtration (sponge or baffled HOB), and regular temperature control. Floating plants, leaf litter, and sight breaks help lower stress. Use a secure lid—bettas jump.

Best Use Cases
Perfect for solo tanks, desk aquariums, and calm community setups with vetted tank mates. Works well in Southeast Asian biotope tanks and planted layouts with minimal flow.

Conservation Context
Captive-bred in large numbers. No wild harvesting involved. However, wild-type Betta splendens are increasingly rare due to hybridization and habitat degradation.

Ideal Aquatic Species
• Mystery or nerite snails
• Kuhli loaches (if space allows)
• Ember tetras or chili rasboras (in large tanks only)
• Amano or large shrimp (risky—test carefully)
• Peaceful bottom dwellers

Region (A)
• Latitude: 15.8700° N
• Longitude: 100.9925° E
(Central Thailand — historical wild range)

Region (B)
• Latitude: 12.5657° N
• Longitude: 104.9910° E
(Western Cambodia — native habitat fringe)