Hapgood River Rainbowfish: Melanotaenia trifasciata Habgood – Vibrant Australian Native

The Hapgood River Rainbowfish, scientifically known as Melanotaenia trifasciata Habgood, is a striking freshwater fish native to the Habgood River in Australia’s Northern Territory. Its deep blue body, accented by vivid red fins and a black lateral stripe, brings a dazzling display to community aquariums. Furthermore, this peaceful schooling fish thrives in groups, making it an excellent choice for aquarists seeking vibrant, active additions.

Caring

A tank of at least 100 litres suits the Hapgood River Rainbowfish, featuring a sandy or fine gravel substrate, driftwood, and dense plants like Vallisneria or Java moss to mimic its natural stream habitat.

For instance, maintain water conditions with a pH of 7.0–8.3, a temperature of 22–26°C, and moderately hard water. Additionally, moderate lighting and a secure tank cover are essential, as these active swimmers may jump. Weekly 25–50% water changes and a moderate-flow filter ensure clean, well-oxygenated water.

Ideal Tank Mates for Hapgood River Rainbowfish

This species flourishes in groups of 8–12, displaying vibrant colours and confident schooling behaviour when kept with conspecifics. They pair well with peaceful fish like neon tetras, Corydoras catfish, or other rainbowfish species. However, avoid aggressive or large fish, such as cichlids, to prevent intimidation due to their active nature. A spacious, planted tank with open swimming areas supports their lively behaviour.

Feeding and Nutrition

As omnivores, these fish thrive on a varied diet to enhance their stunning colouration. For example, offer high-quality flakes or small pellets as a staple, supplemented with frozen or live foods like brine shrimp, daphnia, or bloodworms. Moreover, include plant-based foods such as spirulina flakes or blanched vegetables to ensure balanced nutrition. Feed small portions 2–3 times daily to avoid overfeeding and maintain water quality.

Breeding

Breeding this species is straightforward in a 100-litre tank with fine-leaved plants like Java moss or a spawning mop for egg scattering. Maintain water at 24–26°C and a pH of 7.0–8.0 to encourage spawning. After spawning, remove adults to protect the eggs, which hatch in 7–10 days. Consequently, fry should be fed infusoria or liquid fry food initially, transitioning to baby brine shrimp as they grow.

FAQs About Hapgood River Rainbowfish

What tank size is ideal for Hapgood River Rainbowfish?
A minimum of 100 litres is recommended for a school of 8–12 fish.

Can they live with other species?
Yes, with peaceful fish like tetras or Corydoras, but avoid aggressive or large species.

What do these fish eat?
They eat flakes, pellets, frozen foods like brine shrimp, and plant-based foods like spirulina, fed 2–3 times daily.

Are these fish easy to breed?
Yes, with fine-leaved plants or a spawning mop, though fry need careful feeding with infusoria initially.

What water conditions do they need?
They require a pH of 7.0–8.3, temperatures of 22–26°C, and moderately hard water.

Hapgood River Rainbowfish Species Overview

The Hapgood River Rainbowfish is a vibrant, hardy fish that enhances community aquariums with its striking blue and red colouration and active schooling behaviour. Moreover, its adaptability and ease of care make it suitable for both novice and experienced aquarists. Note that many rainbowfish populations, including this variant, face habitat loss, so sourcing from captive-bred stocks supports conservation efforts.

• Species: Melanotaenia trifasciata Habgood
• Common Name: Hapgood River Rainbowfish
• Origin: Habgood River, Northern Territory, Australia
• Diet: Omnivorous
• pH Range: 7.0–8.3
• Temperature: 22–26°C
• Current Size: Approximately 4–5 cm
• Max Size: Approximately 10–12 cm
• Tank Size: Minimum 100 litres
• Sex: Unsexed

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