Description
Freshwater Mullet
The Freshwater Mullet (Myxus petardi) is a sleek, silver-scaled fish native to the coastal rivers and estuaries of eastern Australia. Known for its streamlined body and active swimming behaviour, this species is both hardy and adaptable, thriving in freshwater and brackish environments. In aquaria, it is prized for its constant movement, schooling nature, and contribution to a natural ecosystem aesthetic. Proper space, water quality, and dietary balance are key to successfully maintaining the Freshwater Mullet in captivity.
Features of Freshwater Mullet
• Native habitat: coastal rivers and estuaries of eastern Australia
• Maximum size: approximately 60 cm in length (typically 30–40 cm in aquaria)
• Lifespan: up to 10 years in optimal conditions
• Temperament: peaceful, schooling species
• Colouration: silvery-grey with a slightly darker back and translucent fins
• Preferred water parameters: temperature 20–26°C; pH 7.0–8.0; hardness 8–15 dGH
• Behaviour: highly active mid- to surface-level swimmer, thrives in groups
The best aquarium size for Freshwater Mullet
Due to its size and activity level, the Freshwater Mullet requires a spacious aquarium of at least 500 litres for a small school of juveniles, with 800 litres or more recommended for adults. The aquarium should be long rather than tall to allow ample swimming space and should have excellent water movement to mimic natural river currents.
Tank Mate Compatibility for Freshwater Mullet
This species cohabits well with other peaceful, fast-moving fish of similar size and temperament. Suitable tank mates include:
• Silver Perch
• Australian Bass (juveniles)
• Empire Gudgeon
• Mouth Almighty
• Rainbowfish (larger species such as Boeseman’s Rainbowfish)
Diet for Freshwater Mullet
An omnivorous grazer, the Freshwater Mullet feeds primarily on algae, detritus, and plant matter in the wild. In captivity, it should receive a varied diet of algae wafers, spirulina flakes, blanched vegetables such as spinach and zucchini, and occasional protein sources like bloodworms or brine shrimp. A steady supply of natural algae growth in the tank supports digestive health and natural foraging behaviour.
Aquarium Setup Freshwater Mullet
Aquarium Filtration
Powerful filtration is essential to maintain pristine, oxygen-rich water. Canister or sump filters with strong flow are recommended to simulate river currents.
Aquarium Plants
Hardy plants such as Vallisneria and Java Fern can be used, though floating vegetation like Hornwort provides shade and surface cover.
Aquarium Lighting
Moderate to bright lighting encourages natural algae growth, which benefits the fish’s diet and overall health.
Aquarium Heating
Maintain water temperatures between 22–25°C with stable heating, avoiding rapid fluctuations.
Aquarium Substrate
A mix of smooth river sand and fine gravel best replicates their natural habitat and allows for natural foraging.
Aquarium Decorations
Use driftwood, rounded rocks, and open swimming areas to mimic river channels. Ensure strong water flow and oxygenation to reflect their active, current-loving nature.
