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Sleepy Cod Large – Australia’s Mighty Freshwater Mate
Sleepy Cod Large, known scientifically as Oxyeleotris lineolata, brings a true Aussie flair to your aquarium. This fascinating fish, native to Australia’s freshwater systems, grows impressively and displays a calm yet territorial nature. Consequently, it suits dedicated aquarists who can meet its needs. In this guide, we’ll cover its care requirements, ensuring you create a thriving environment for this unique species.
Size and Lifespan
Sleepy Cod Large reaches up to 45cm when fully grown, making it a substantial addition to your tank. With proper care, it lives around 5–8 years. Therefore, providing a spacious tank and stable conditions is crucial for its health. Regular maintenance, including water quality checks, supports its longevity and keeps it thriving.
Ideal Tank Setup
To ensure your Sleepy Cod Large feels at home, mimic its natural Australian riverine habitat. A large tank with ample hiding spots and a sandy substrate works best. Moreover, maintaining stable water parameters is essential for its well-being.
- To replicate its natural habitat:
- Use a tank of at least 200 litres for adequate space.
- Add driftwood, rocks, and caves for hiding spots.
- Install a strong filtration system to keep water clean.
- Maintain a pH of 7–8 and temperature of 18–24°C.
Compatible Tank Mates
Choosing the right tank mates for this fish requires careful thought due to its semi-aggressive nature. It thrives with fish of similar size and temperament. Thus, pairing it with robust species prevents conflicts and ensures harmony.
- Suitable tank mates include:
- Silver Perch
- Archerfish
- Larger Rainbowfish
Diet and Feeding
Sleepy Cod Large is a carnivore, eagerly accepting a variety of meaty foods. Offer high-quality pellets, frozen prawns, and worms to meet its nutritional needs. Additionally, feed it 2–3 times weekly to maintain health. Avoid overfeeding, as this can harm water quality and its well-being.
Breeding and Behaviour of Sleepy Cod Large
This species displays territorial behaviour, especially as it matures. Males may guard specific areas, so provide ample space to reduce stress. Breeding is challenging in captivity, as they are egg-layers requiring specific conditions. Therefore, most aquarists focus on maintaining their health rather than breeding.
Species Overview
- Species – Oxyeleotris lineolata
- Common Name – Sleepy Cod
- Origin – Australia
- Diet – Carnivore
- pH Range – 7 – 8
- Temperature – Tropical 18°C – 24°C
- Breed Type – Egg Layer
- Current Size – 12-15cm
- Max Size – Approximately 45cm
- Tank Size – Minimum 200 litres
FAQs
What size tank is ideal for Sleepy Cod Large?
A minimum 200-litre tank suits Sleepy Cod Large, providing ample space for its size and territorial nature.
Can they live with other fish?
Yes, they coexist with robust, similarly sized fish like Silver Perch or Archerfish, avoiding small or overly peaceful species.
How often should I feed them?
Feed them 2–3 times weekly with meaty foods like prawns or pellets to maintain health.
Do they need to be in groups?
No, they thrive alone or in pairs, as they can become territorial with others of their kind.
How long do they live?
With proper care, they live 5–8 years, depending on tank conditions and diet.
Add a Sleepy Cod Large to Your Aquarium Today!
WA Customers: Note that Sleepy Cod Large requires an aquaculture licence and appropriate import documentation for Western Australia.






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