Spotted Blue-Eye Rainbowfish – Aru (Pseudomugil gertrudae)

Quarantined rainbowfish for planted aquariums and carefully selected community setups in Canada.

Pseudomugil gertrudae, often called the Spotted Blue-Eye Rainbowfish, is a small, delicate blue-eye rainbowfish known for its spotted fins, blue eyes, and lively display behaviour. The Aru form is especially attractive in planted nano and species-focused aquariums.

Why This Fish Stands Out

• Small blue-eye rainbowfish with spotted fins and active display
• Excellent choice for planted nano-style aquariums
• Males show beautiful fin-flaring behaviour in groups

Aquarium Setup & Behaviour

Provide a mature planted aquarium with gentle flow, clean water, floating cover, and a secure lid. These fish are small and should not be kept with large or aggressive tankmates.

Best kept in a group. Multiple males and females encourage natural display behaviour and better confidence.

Feeding

Feed very small quality foods, micro-pellets, crushed flakes, and frozen/live micro foods.

Natural Colour & Livestock Integrity

Fin colour and display come from healthy conditioning and social behaviour. No hormones are used to enhance colour.

Topick Aquarium Livestock Standard

All fish at Topick Aquarium are carefully quarantined and conditioned to our stable local tap water before sale. Although this species may have different natural habitat preferences in the wild, we focus on stability, gradual acclimation, healthy feeding, and mature aquarium systems before fish become available to customers.

Care Summary

• Scientific Name: Pseudomugil gertrudae
• Adult Size: Approximately 3–4 cm
• Care Level: Intermediate
• Recommended Tank: Mature planted freshwater aquarium with stable filtration and compatible tankmates

Frequently Asked Questions

Is Pseudomugil gertrudae good for nano tanks?
Yes, but it still needs stable water, a group, and swimming space rather than a tiny unstable setup.

Why are group packs recommended?
Blue-eye rainbowfish show better confidence and male display behaviour in groups.

Can they live with shrimp?
They are small and peaceful, but very tiny baby shrimp may still be eaten. Dense plants improve shrimp survival.

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