Reticulated Glassfish

The Reticulated Glassfish (Ambassis macleayi) is an attractive Australian native freshwater fish admired for its semi-transparent body, delicate reticulated patterning and peaceful schooling behaviour. Naturally found in slow-moving rivers, floodplains and billabongs across northern Australia and southern New Guinea, this species is an excellent choice for community aquariums. Reticulated Glassfish are active mid-water swimmers that display their best colours and confidence when kept in groups, making them a fascinating addition to a well-planted freshwater aquarium.

Features of Reticulated Glassfish

• Scientific name: Ambassis macleayi

• Commonly known as Reticulated Glassfish

• Native to northern Australia and southern New Guinea

• Adult size: up to 10 cm

• Peaceful schooling freshwater fish

• Semi-transparent silver body with fine reticulated markings

• Best kept in groups of six or more

• Lifespan of approximately 5–8 years with proper care

• Suitable for peaceful community aquariums

The best aquarium size for Reticulated Glassfish

A minimum aquarium volume of 100 litres is recommended for a small school. Larger aquariums provide ample swimming space and encourage natural schooling behaviour. Maintain a water temperature between 24–28°C, a pH of 6.8–7.8 and moderate water hardness. Stable water quality and regular maintenance are essential for keeping these fish healthy and active.

Tank Mate Compatibility for Reticulated Glassfish

Suitable tank mates include:

• Rainbowfish

• Pearl Gourami

• Bristlenose Catfish

• Corydoras

• Harlequin Rasbora

Avoid aggressive or overly boisterous fish that may intimidate this peaceful species or outcompete it during feeding.

Diet for Reticulated Glassfish

Reticulated Glassfish are omnivores and readily accept a varied diet. Feed a quality tropical flake or micro pellet as the staple food, supplemented with frozen or live foods such as brine shrimp, daphnia and bloodworms. Occasional insect larvae and other small invertebrates help support natural feeding behaviour, vibrant health and breeding condition. Offer small meals once or twice daily and avoid overfeeding to maintain excellent water quality.

Aquarium Setup Reticulated Glassfish

Aquarium Filtration

Provide efficient filtration with gentle to moderate water flow to maintain clean, oxygen-rich water without creating excessive current.

Aquarium Plants

Dense plantings of live aquatic plants provide shelter, reduce stress and encourage natural schooling behaviour. Floating plants can also help diffuse bright lighting.

Aquarium Lighting

Moderate aquarium lighting enhances the fish's shimmering transparent appearance while supporting healthy plant growth.

Aquarium Heating

Use a reliable aquarium heater to maintain a stable temperature between 24–28°C throughout the year.

Aquarium Substrate

A dark sand or fine gravel substrate enhances the Reticulated Glassfish's subtle colours and creates a natural-looking aquarium.

Aquarium Decorations

Incorporate driftwood, rocks and planted areas while leaving generous open swimming space through the centre of the aquarium. This balance allows Reticulated Glassfish to school naturally while providing areas of security and refuge.