Half Moon Betta - Fancy Koi

The Fancy Koi Halfmoon Betta is one of the most stunning, premium varieties of Betta splendens in the aquarium hobby. This highly prized fish combines the marbled, multi-colored patterns of a traditional koi fish with the dramatic, 180-degree fan-like tail of a classic Halfmoon Betta.

What Makes Them Special?

The "Fancy Koi" Pattern: They feature a marble gene that causes their colors to change over time. "Fancy" means they display a highly diverse palette beyond just basic red and white. You will see combinations of bright orange (Nemo), yellow (Tiger), deep blues, blacks, and even iridescent metallic scaling (Galaxy).

The Halfmoon Tail: When the fish flares, its tail fin spreads perfectly straight at the edges, forming a dramatic D-shape or a half-circle.

Active Nature: Breeders note that Koi Bettas tend to be more active, energetic, and highly expressive compared to standard long-finned varieties.

Quick Care Overview

If you are planning to house one of these beautiful fish, they thrive best under these conditions:

Tank Size: A minimum tank size of 20 to 40 liters (5 to 10 gallons) is highly recommended.

Water Temperature: Keep it warm with a reliable heater, ideally between 24°C and 27°C (76°F–80°F).

Fin Safety: Because they have massive, heavy fins, use live or smooth silk plants. Avoid plastic plants with sharp edges that can shred their delicate tails.

Filter: Use a low-flow filter (like a sponge filter). Heavy currents will quickly exhaust a long-finned Halfmoon Betta.