Pseudomugil ivantsoffi A rare and highly sought-after Blue Eye Rainbowfish featuring brilliant blue eyes, vibrant yellow finnage, and peaceful schooling behaviour for planted aquariums. Quick Facts Scientific name: Pseudomugil ivantsoffi Common name: Ivantsoff's Blue Eye Adult size: 3–4 cm Tank size: 40L+ recommended Difficulty: 🟡 Intermediate Temperament: Peaceful Best kept: Schools of 8 or more Is this for you? ✔️ Perfect if: You enjoy collecting rare Blue Eye Rainbowfish. You keep a heavily planted aquarium. You appreciate peaceful schooling fish. You enjoy observing natural courtship displays. ❌ Avoid if: You keep aggressive or fin-nipping fish. You plan to keep only one or two individuals. Your aquarium has strong water flow. You don't have a secure-fitting lid. Why choose Pseudomugil ivantsoffi? Pseudomugil ivantsoffi is one of the rarer members of the Blue Eye Rainbowfish family and is highly prized by enthusiasts of Australian and Papua New Guinea rainbowfish. Mature males develop elegant yellow to golden fins that contrast beautifully with their unmistakable sapphire-blue eyes. Like other Blue Eyes, males regularly display to one another by extending their fins and performing gentle courtship dances. These interactions are peaceful and become increasingly impressive as the group matures. When housed in a densely planted aquarium with dark substrate and quality lighting, their colours intensify dramatically, creating an elegant and constantly active display. Common mistakes Keeping too few fish. Housing them with aggressive or boisterous species. Leaving the aquarium uncovered—they are capable jumpers. Providing little plant cover. Allowing water quality to deteriorate. Care made simple Temperature: 22–28°C pH: 6.5–7.8 Diet: Premium nano pellets, baby brine shrimp, daphnia, microworms and frozen foods Water: Clean, stable and well-filtered with gentle flow Setup: Heavily planted aquarium with floating plants, open swimming areas and a secure lid Pairs perfectly with Pseudomugil luminatus Pseudomugil gertrudae Threadfin Rainbowfish Corydoras Java Moss and fine-leaved aquatic plants NTA Insight: Pseudomugil ivantsoffi isn't seen nearly as often as Luminatus or Gertrudae, making it a fantastic choice for hobbyists looking for something a little different. Their peaceful nature, striking blue eyes and elegant yellow finnage make them a rewarding species that really shines when kept in a large school. FAQ How many Pseudomugil ivantsoffi should I keep? Keep them in groups of at least eight individuals. Larger schools encourage more natural behaviour, stronger colours and more frequent display activity. Can they live with shrimp? Yes. Adult shrimp are generally safe, although tiny shrimplets may occasionally be eaten. Dense mosses provide excellent protection for young shrimp. Are they suitable for beginners? They are relatively easy to care for once established, but their rarity means they're often chosen by hobbyists looking to expand their Blue Eye collection. Can they breed in home aquariums? Yes. Like other Blue Eye Rainbowfish, they spawn readily among fine-leaved plants or spawning mops when maintained in excellent water quality. What makes Pseudomugil ivantsoffi special? Its rarity, brilliant sapphire-blue eyes and elegant golden-yellow finnage make it one of the more unusual and desirable members of the Pseudomugil genus.
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