Female Fighter Koi

The Female Koi Fighter Fish is a stunning ornamental variety of Betta splendens, selectively bred for its vivid marbled coloration and oversized pectoral fins. The Female Koi Betta is a Fancy strain exhibits vibrant, unpredictable patterns in red, orange, yellow, black, and white, often shifting over time due to the marble gene. Female Bettas are less aggressive than males but still display bold personalities and unique fin structures, making them a centrepiece in peaceful aquariums. Pictures Examples only. Features of Female Fighter Koi Grows up to 6-7 cm in length Multicolour patterning with marbled Koi traits Lifespan of 2–4 years in optimal conditions Labyrinth fish: can breathe air from the surface Less territorial than males but can be semi-aggressive toward other females Ideal for species tanks or carefully chosen community setups The best aquarium size for Female Fighter Koi A single female can be kept in a tank as small as 20 litres, but 30 litres or more is ideal for improved water quality and enrichment. In a female-only sorority (5+ individuals), a minimum of 75 litres with plenty of cover is required to distribute aggression. Avoid housing with fin-nippers or larger aggressive fish. Tank Mate Compatibility for Female Fighter Koi Ember Tetra Pygmy Corydoras Kuhli Loach Amano Shrimp (with caution) Nerite Snail Diet for Fighter Female Fighter Koi These fish are carnivorous and thrive on a varied, high-protein diet. Feed high-quality Betta pellets, frozen or live foods such as bloodworms, brine shrimp, daphnia, and blackworms. Supplement with occasional micro-pellets or insect-based flakes. Feed once or twice daily in small portions to prevent overfeeding and maintain water quality. Aquarium Setup Female Fighter Koi Aquarium Filtration Use a gentle sponge filter or adjustable flow internal filter to avoid stressing the Betta’s delicate fins. Clean water is essential, but strong currents should be avoided. Aquarium Plants Live plants like Anubias, Java Fern, Water Sprite, and floating plants provide cover and reduce stress. Bettas appreciate shaded areas and soft cover. Aquarium Lighting Low to moderate lighting works best. Overhead brightness can be softened with floating plants to mimic their natural habitat and enhance colouration. Aquarium Heating Maintain water temperature between 25–28°C. Bettas are tropical fish and suffer in cooler water, so a reliable heater is essential. Aquarium Substrate Use soft sand or smooth gravel. Darker substrates enhance their colours and provide a natural feel. Avoid sharp or jagged substrates. Aquarium Decorations Decorate with driftwood, smooth rocks, ceramic caves, or Betta hammocks. Ensure all décor has smooth edges to protect the Dumbo’s long, flowing fins from tears. Provide ample hiding spots and open swimming space.