Pseudomugil gertrudae “Aru IV”
Pseudomugil gertrudae “Aru IV” (Spotted Blue Eye Rainbowfish)
The Pseudomugil gertrudae “Aru IV”, commonly known as the Spotted Blue Eye Rainbowfish, is a stunning nano freshwater fish prized for its bright yellow body, black-spotted fins, and shimmering blue eyes. This rare, location-specific variant from the Aru Islands is highly sought after by aquascapers and collectors.
Peaceful, active, and full of personality, these schooling fish are perfect for planted nano aquariums and community tanks. Their small size and vibrant display make them an excellent choice for hobbyists looking to add color and movement to smaller setups.
Key Features
- Unique Coloration: Yellow body with spotted fins and bright blue eyes
- Rare Variant: “Aru IV” location form prized by collectors
- Nano Schooling Fish: Ideal for smaller aquariums
- Peaceful Temperament: Great with shrimp and small fish
Care Information
- Scientific Name: Pseudomugil gertrudae
- Common Name: Spotted Blue Eye Rainbowfish
- Variant: Aru IV
- Origin: Aru Islands, Papua region
- Size: Up to 1–1.2 inches
- Care Level: Easy to Moderate
- Temperament: Peaceful (schooling fish)
- Tank Size: 10 gallons minimum
- Temperature: 72–80°F
- pH: 6.0–7.5
- Hardness: Soft to moderately hard
- Diet: Omnivore (micro pellets, frozen and live foods like daphnia and baby brine shrimp)
Tank Mates
Pseudomugil gertrudae do well with peaceful nano species such as shrimp, snails, small tetras, rasboras, and other nano fish. Avoid larger or aggressive tank mates.
Schooling Behavior
This species should be kept in groups of 6–10 or more to encourage natural behavior, reduce stress, and create a more vibrant display in the aquarium.
Aquarium Setup
Provide a heavily planted aquarium with floating plants, gentle flow, and open swimming areas. These fish thrive in stable water conditions and feel most comfortable with natural cover.
Color & Display
With proper care, a varied diet, and good lighting, these fish display their best colors and active schooling behavior, creating a dynamic and eye-catching aquarium.
FAQ
Are Pseudomugil gertrudae “Aru IV” good for nano tanks?
Yes, they are perfect for planted nano aquariums of 10 gallons or more.
How many should I keep together?
A group of 6–10 or more is recommended for best behavior and coloration.
Are they shrimp safe?
Yes, they are peaceful and compatible with shrimp and other small invertebrates.
Do they need a planted aquarium?
Yes, they thrive in planted tanks with floating plants and gentle flow.
Are they rare?
Yes, the “Aru IV” variant is a sought-after, location-specific strain prized by collectors.
Shop with Confidence
At Tropical Treasures Wyo, we provide healthy, active fish ready to thrive in your aquarium. Our Pseudomugil gertrudae “Aru IV” are carefully selected and packed to ensure a smooth transition into your tank.
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