Koi Nemo Roundtail Betta (Betta splendens) – Male

Koi Nemo Roundtail Betta (Betta splendens)

Common Name: Koi Nemo Betta, Roundtail Betta
Size: 2.5–3 inches (adult)
Origin: Selectively bred in Southeast Asia (Thailand, Indonesia)
Temperament: Semi-aggressive (especially males)
Tank Size: 5+ gallons (solo); 10+ gallons for sorority/community setups
Water Conditions:

• Temperature: 76–82°F (24–28°C)

• pH: 6.5–7.5

• Hardness: Soft to moderate (3–12 dGH)

The Koi Nemo Roundtail Betta is a vibrant, artistic expression of nature’s beauty—featuring a marbled patchwork of orange, red, black, white, and even metallic blues or greens. The roundtail fin shape offers a graceful, balanced look that differs from the more common halfmoon or veiltail varieties, making this Betta both unique and elegant.

Selective breeding has given rise to the "Koi" color pattern and "Nemo" variant, which mimics the orange-white-black coloration of clownfish, with individual markings that are one-of-a-kind—no two Koi Bettas look alike!

Fun Facts:

• Bettas breathe atmospheric air thanks to a labyrinth organ, allowing them to survive in low-oxygen environments.

• The "Koi" and "Nemo" names refer to color pattern, not species—these are designer strains of Betta splendens.

• Koi Bettas often change colors over time due to the marble gene, meaning your Betta may evolve as it matures!

Diet:
Carnivorous—prefers high-protein diets like Betta pellets, frozen bloodworms, brine shrimp, and daphnia. Feed in small amounts 1–2 times daily.

Compatibility:
Best housed alone or with peaceful, non-fin-nipping tankmates like snails, shrimp (with caution), or small schooling fish in a well-monitored community tank. Avoid housing two male Bettas together.

Bright, bold, and full of personality, the Koi Nemo Roundtail Betta is a show-stopping centerpiece fish that thrives with proper care and makes an unforgettable addition to any freshwater setup.