Ivantsoff Blue-eye or Pseudomugil Ivantsoffi originate from West Papua. The habitat consisted of small (1-2 m wide), shallow, slow-flowing streams in dense rainforest. They are suited for Nano tanks as their size is max 4 cm. They love it a bit warmer 24 -28 degrees. They prefer moderate soft water about 200 µs is well suited but can be kept up to 400 µs without issue. They should be kept at about min. 6 animals, ideally 10 would be perfect.