Aru II Gertrude’s Spotted Blue Eye Rainbowfish (Pseudomugil gertrudae) - Tank-Bred!

Product Overview

The Aru II Gertrude’s Spotted Blue Eye Rainbowfish (Pseudomugil gertrudae) is one of the most desirable Blue Eye Rainbowfish available in the aquarium hobby. This premium population is prized for its brilliant blue eyes, heavily spotted finnage, and elegant display behavior. Despite their small size, these fish quickly become the center of attention in a planted aquarium.

Males spend much of their day displaying to one another by extending their ornate fins and showcasing their spotted patterns in an effort to attract females. These displays are peaceful, fascinating to observe, and one of the primary reasons hobbyists fall in love with this species.

Our Tank-Bred and Locally Bred Aru II Gertrude’s Spotted Blue Eye Rainbowfish are well adapted to aquarium life and thrive in planted community aquariums. Locally Bred specimens are typically offered at a larger purchase size, making them an excellent choice for hobbyists seeking more developed fish with emerging adult finnage and coloration.

What We Love About This Fish

• Active, schooling community fish that thrives in planted aquariums

• Compatible with most invertebrates, including dwarf shrimp

• Adults, especially males, display colorful and ornate finnage

• Among the smallest of the Blue Eye Rainbowfish

• Premium Aru II variant prized for exceptional finnage and display behavior

Quick Care Guide

• Care Level: Easy

• Temperament: Peaceful

• Diet: Omnivore

• Source: Tank-Bred | Locally Bred

• Adult Size: Approximately 1.2–1.5 Inches (3–3.8 cm)

• Average Purchase Size:

• Tank-Bred: Approximately 0.5–0.75 Inch (1.3–1.9 cm)
• Locally Bred: Approximately 1+ Inch (2.5+ cm)

• Lifespan: 2–4 Years

• Activity Level: Active

• Schooling Behavior: Shoaling Fish

• Recommended Group Size: 8+ Individuals

• Swimming Zone: Upper to Middle Levels

Tank Parameters

• Temperature: 72–82°F (22–28°C)

• pH: 6.0–7.8

• GH: 2–12 dGH

• Minimum Aquarium Size: 10 Gallons

• Recommended Group Size: 8+ Individuals

• Water Flow: Gentle to Moderate