Description:

The term “Duboulayi Rainbow – Oyster Creek (Yellow)” refers to a specific color morph or locality variant of the Crimson-spotted Rainbowfish, scientifically known as Melanotaenia duboulayi.

Duboulayi Rainbow (or Duboulay’s Rainbowfish/Crimson-spotted Rainbowfish): This is the common name for Melanotaenia duboulayi. It’s a popular freshwater fish endemic to coastal eastern Australia, specifically found in river systems east of the Great Dividing Range in northeastern New South Wales and southeastern Queensland. It was one of the first Australian rainbowfish to be introduced to the international aquarium hobby.

Oyster (Yellow): This indicates a specific colour form or strain of Melanotaenia duboulayi that exhibits a predominant yellow colouration. The “Oyster Creek” designation often refers to a particular locale in Queensland where this yellow variant originates. Rainbowfish are known for their significant colour variations depending on their geographical origin, and breeders often emphasise these local variants. The “Yellow Oyster Creek” Duboulayi Rainbow is particularly sought after for its vibrant golden-yellow body with metallic sheen and often red fins, which can be quite striking in an aquarium.

Key characteristics and care for Melanotaenia duboulayi (including the yellow Oyster Creek variant):

Size: Males can reach up to 12 cm (4.7 inches), but are usually smaller, around 10 cm (3.9 inches). Females are typically smaller.

Colouration: While the general species can be silvery-blue or green, this specific “Oyster (Yellow)” variant is noted for its golden yellow body with metallic sheen, yellow lines on scale rows, and often red fins. Males are typically more brightly coloured, especially during spawning, and may develop intensely black margins on their fins. A prominent crimson-red spot is usually visible on the operculum (gill cover).

Temperament: Generally peaceful community fish.

Tank Mates: They do well in groups of 6 or more and can be housed with other peaceful community fish like Corydoras catfish, Bristlenose catfish, platies, mollies, and peaceful tetras.

Diet: Omnivorous. They accept high-quality flakes, small pellets, and live or frozen foods such as bloodworms, brine shrimp, and daphnia. Including some plant-based foods like spirulina is also beneficial. They should be fed small amounts 1-2 times daily.

Tank Requirements:

Tank Size: Minimum 80 liters (approx. 20 gallons) for a small group, but a longer tank (e.g., 90cm or 3ft) is recommended as they are active swimmers.

Water Parameters: Highly adaptable.

Temperature: 11C – 34C (52F – 93F) in their natural habitat, but typically 22-28C (71.6-82.4F) in aquariums is suitable.

pH: 5.8 – 9.0 (they tolerate a wide range, but stability is key).

Hardness: 5 – 10N (89.29 – 178.57ppm) is often recommended, though they can tolerate wider ranges.

Filtration: Good filtration is important for clean, well-oxygenated water.

Substrate: Dark substrate can help bring out their colors.

Plants and Decorations: They appreciate well-planted tanks with dense aquatic vegetation and open swimming spaces. Floating plants are also beneficial. Rocks and wood can provide hiding spots.

Lid: A tight-fitting lid is essential as they are known jumpers.

Breeding: Achievable in a home aquarium. They are egg scatterers, and eggs adhere to fine-leaved plants or spawning mops. Parents should be removed after spawning to prevent egg consumption. Fry are very small and require infusoria or liquid fry food initially.

Lifespan: With proper care, they can live for 3-4 years, potentially longer.

The “Duboulayi Rainbow – Oyster (Yellow)” is a beautiful and hardy choice for an Australian native community aquarium, particularly appreciated for its striking yellow hues.

Scientific Name: Melanotaenia duboulayi.

Origin:Gin Gin Queensland

• Grows to: 12cm
• Temperature: 11C – 34C
• pH: 5.8 – 9.0
• Temperament: Peaceful

Feeding:

• Omnivore