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Description

The Pacific Blue Eye (Pseudomugil signifer) is a vibrant and hardy freshwater fish native to the streams and coastal rivers of eastern Australia. Renowned for its striking iridescent blue eyes and colorful fins, this species is a popular choice for community aquariums due to its peaceful nature and adaptability. Its active schooling behaviour and ease of care make it ideal for both beginner and experienced aquarists interested in native Australian fish. The population from the Harvey Creek (near Innisfail) is larger and more active than most Pacific Blue-eyes, it appreciates plenty of swimming room and good water flow.

Features of the Pacific Blue Eye

  • Small, slender body reaching up to 4 cm in length

  • Brilliant iridescent blue eyes that give the species its name

  • Transparent to silver body with subtle blue and yellow fin accents

  • Peaceful schooling fish that thrives in groups of six or more

  • Adaptable to a range of water conditions with good water quality

The Best Aquarium Size for Pacific Blue Eye
A minimum aquarium size of 40 litres is recommended for a small school of Pacific Blue Eyes. A longer tank is preferred to provide ample swimming space for their active schooling behaviour. Well-oxygenated water with gentle flow enhances their health and activity levels.

Tank Mate Compatibility for Pacific Blue Eye
Pacific Blue Eyes are peaceful and best kept with other small, non-aggressive fish. Suitable tank mates include:

  • Pygmy Corydoras

  • Murray River Freshwater Shrimp

  • White Cloud Mountain Minnows

  • Dwarf Rainbowfish

  • Australian Glassfish

Diet for Pacific Blue Eye
This omnivorous species thrives on a varied diet including high-quality micro pellets, flakes, and frozen foods such as daphnia, brine shrimp, and bloodworms. They also benefit from occasional live foods to stimulate natural hunting behaviour.

Aquarium Setup for Pacific Blue Eye

Aquarium Filtration
A gentle filtration system such as a sponge filter or low-flow hang-on-back filter is ideal to maintain clean, oxygen-rich water without stressing the fish.

Aquarium Plants
Dense planting with species like Java Moss, Hornwort, and Anacharis provides shelter and encourages natural schooling behaviour.

Aquarium Lighting
Moderate lighting supports plant growth and highlights the Pacific Blue Eye’s vibrant coloration without causing stress.

Aquarium Heating
Maintain water temperatures between 20°C and 26°C. Stability in temperature is important to prevent stress.

Aquarium Substrate
Fine gravel or sand substrate is recommended, supporting planted aquariums and easy maintenance.

Aquarium Decorations
Incorporate natural decorations such as driftwood, smooth rocks, and leaf litter to mimic their native habitat and provide hiding places.

Additional Information

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