The Forktail Rainbowfish (Pseudomugil furcatus) is a true showstopper among rainbow fish species. Males display striking lemon-yellow dorsal, caudal, and anal fins, accented with black trim and a dramatic, deeply forked tail. Both sexes boast brilliant blue eyes, lending the species its popular nickname. Forktail Rainbowfish are prized for their small adult size and unique, rarely exceeding 2 inches (5 cm), fluttering swimming style. When kept in groups, males intensify their fin displays and colors in lively courtship rituals. Their slender, translucent bodies and yellow-black forked tails are especially eye-catching under aquarium lighting, adding shimmering movement to the upper and middle levels of your tank. Peaceful, highly social, and happiest in groups of 8 or more, Forktail Rainbowfish are model community fish. They get along beautifully with other gentle nano fish such as Ember Tetras, Chili Rasboras, Celestial Pearl Danios, Corydoras, and Neocaridina shrimp. Their peaceful nature makes them a perfect fit for lush, planted aquascapes and biotope-style community tanks. At Splashy Fish tropical fish store, our Folktail Rainbowfish for sale are raised with the utmost care. All our Rainbowfish for sale are tank-bred and acclimated for home aquariums, ensuring robust health and vibrant colors. Visit our fish store online or in person at aquarium Virginia to explore our wide selection of high-quality freshwater fish for sale. We also offer betta fish for sale, freshwater shrimp for sale, aquarium plants for sale, and a variety of aquarium supplies. What You Can Expect From This Fish Stunning yellow fins and neon-blue eyes, a true showpiece nano fish Deeply forked tail for dramatic swimming displays Tiny adult size (max 2 inches), perfect for nano and planted aquariums Peaceful schooling species, ideal for community tanks Hardy and beginner-friendly when kept in clean, well-maintained water Recommended Tank Parameters Temperature: 72°-78°F (22°–26°C) pH: 6.0-7.5 KH: 2–10 dKH Minimum Tank Size: 10 gallons (ideally in a school of 8+) Care Guidelines Diet: Forktail Rainbowfish are micro-predators and omnivores. Feed a mix of high-quality micro pellets, crushed flakes, and occasional live or frozen foods such as baby brine shrimp, daphnia, or cyclops for vibrant colors and optimal health. Social Behavior: Extremely peaceful. Schooling is essential; keep in groups of 8 or more for best health, natural behavior, and stunning displays. Aquascaping: They thrive in planted tanks with plenty of open swimming space, fine-leaved plants (like Java Moss or Hornwort), and gentle filtration. Floating plants help diffuse light and reduce stress. Water Quality: Maintain stable, clean, well-oxygenated water with gentle flow and regular water changes. Avoid strong currents, as Forktail Rainbowfish come from slow-moving habitats. Forktail Rainbowfish Frequently Asked Questions (FAQs) How big do Forktail Rainbowfish get? Forktail Rainbowfish (Pseudomugil furcatus) stay small, typically reaching an adult size of about 1.5 to 2 inches (4–5 cm) in home aquariums. Their petite size and slender build make them an excellent choice for nano tanks and densely planted aquariums. Keeping them in a school helps promote their natural behaviors and showcases their vibrant yellow fins and signature forked tails. Are Forktail Rainbowfish aggressive? No, Forktail Rainbowfish are not aggressive. They are peaceful, community-friendly fish that thrive best in groups of their own kind. Forktail Rainbowfish get along well with other small, non-aggressive species such as tetras, rasboras, corydoras, and shrimp. Their gentle nature and active schooling behavior make them a popular choice for both beginner and experienced aquarists looking for harmony in a community tank. How to breed Forktail Rainbowfish? Breeding the Forktail Rainbowfish (Pseudomugil furcatus) is quite achievable in a well-prepared aquarium. To encourage breeding, set up a dedicated breeding tank with soft, slightly acidic to neutral water (pH 6.0-7.0), gentle filtration, and plenty of fine-leaved plants or spawning mops for egg deposition. Start with a healthy group of adults and feed them a protein-rich diet of live or frozen foods to condition them for spawning. When ready, males will display their colorful fins to attract females, and the pair will scatter tiny eggs among the plants or mops, usually during the early morning hours. After spawning, it’s best to remove the adults to prevent them from eating the eggs. The eggs typically hatch within 7–10 days, and the tiny fry should be fed infusoria or liquid fry food until they are large enough to accept newly hatched baby brine shrimp. With good water quality and consistent feeding, you can successfully raise Forktail Rainbowfish fry to adulthood. { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How big do Forktail Rainbowfish get?", "acceptedAnswer": { "@type": "Answer", "text": "Forktail Rainbowfish stay small, typically reaching an adult size of about 1.5 to 2 inches in home aquariums. Their petite size and slender build make them an excellent choice for nano tanks and densely planted aquariums. Keeping them in a school helps promote their natural behaviors and showcases their vibrant yellow fins and signature forked tails." } }, { "@type": "Question", "name": "Are Forktail Rainbowfish aggressive?", "acceptedAnswer": { "@type": "Answer", "text": "No, Forktail Rainbowfish are not aggressive. They are peaceful, community-friendly fish that thrive best in groups of their own kind. Forktail Rainbowfish get along well with other small, non-aggressive species such as tetras, rasboras, corydoras, and shrimp. Their gentle nature and active schooling behavior make them a popular choice for both beginner and experienced aquarists looking for harmony in a community tank." } }, { "@type": "Question", "name": "How to breed Forktail Rainbowfish?", "acceptedAnswer": { "@type": "Answer", "text": "Breeding the Forktail Rainbowfish is quite achievable in a well-prepared aquarium. To encourage breeding, set up a dedicated breeding tank with soft, slightly acidic to neutral water, gentle filtration, and plenty of fine-leaved plants or spawning mops for egg deposition. Start with a healthy group of adults and feed them a protein-rich diet of live or frozen foods to condition them for spawning. When ready, males will display their colorful fins to attract females, and the pair will scatter tiny eggs among the plants or mops, usually during the early morning hours. After spawning, it’s best to remove the adults to prevent them from eating the eggs. The eggs typically hatch within 7–10 days, and the tiny fry should be fed infusoria or liquid fry food until they are large enough to accept newly hatched baby brine shrimp. With good water quality and consistent feeding, you can successfully raise Forktail Rainbowfish fry to adulthood." } } ] }
