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Gertrudes Spotted Blue Eye Rainbowfish (Pseudomugil gertrudae) for Sale: Size, Tank, Care, Types, Breeding


Gertrudes Spotted Blue Eye Rainbowfish
photo credit Aquatic Arts

Native to Indonesia, New Guinea, and Australia, the Gertrude's Spotted Blue Eye Rainbowfish (Pseudomugil gertrudae) is one of the Blue Eye Rainbowfish's less common subspecies. It prefers living in a planted aquarium, where it can hide from predators among the floating foliage. It typically lives in large schools in areas with dense vegetation. Males, especially when fighting with other males, have iridescent yellow and blue coloring on their bodies and fins. In adult males, the second dorsal and anal fins grow to a long, fan-like length. Most females are somewhat diminutive and have a lovely orange-yellow coloring.

The Gertrude's Spotted Blue Eye Rainbowfish gets along great with other fish of the same size and even mature dwarf shrimp. Keep this fish in groups of at least six, including multiple males, in a large, densely planted aquarium with adequate space for subdominant males to avoid harassment from dominant males, and you'll see the most vibrant displays of coloration. Most rainbowfish have better coloration on darker substrate.

This fish readily accepts high-quality flake foods, but for optimum health and coloration, it also needs a steady diet of small frozen or live meaty foods. As the Gertrude's Spotted Blue Eye Rainbowfish is a shy species, it is important to take extra precautions to ensure it gets its fair share of the food available in the aquarium, as it is easily outcompeted for by more robust predators.

Many people keep rainbowfish in their freshwater aquariums because of their beautiful colors and hardiness. The Gertrude's Spotted Blue Eye Rainbowfish is a rare exception to the rule that most popular rainbowfish species eventually become too large to be kept with dwarf shrimp and some other nano species. Full-grown Forktail Rainbowfish can coexist peacefully with adult dwarf shrimp and virtually all of the other non-aggressive invertebrates we stock.

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