Description
Overview:
The Emerald Green Rainbowfish is a rare and beautiful species known for its shimmering green iridescence, subtle body stripes, and graceful schooling behavior. Males display the most vibrant coloration, especially during courtship, ranging from emerald to bluish-green, often with hints of gold or silver. This peaceful, active fish is a perfect addition to a well-planted community aquarium or a specialized rainbowfish setup.
Origin:
Endemic to Lake Wanam in Papua New Guinea, this species is considered critically endangered in the wild due to habitat loss and introduced species. Most specimens in the hobby come from captive-bred lines, making them a valuable conservation-friendly choice.
Feeding:
Omnivorous and easy to feed. Offer a varied diet of high-quality flake or micro pellets, along with frozen or live foods such as brine shrimp, bloodworms, and daphnia. Include occasional vegetable-based flakes or spirulina to enhance color and digestion.
Tank Mates:
Peaceful and best kept in groups of 6 or more. Suitable tank mates include other rainbowfish, Corydoras, tetras, rasboras, gouramis, and other calm community fish. Schooling helps reduce stress and brings out natural behaviors.
Water Parameters:
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Temperature: 75–82°F (24–28°C)
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pH: 6.8–7.8
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Hardness: 5–15 dGH
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Minimum Tank Size: 30–40 gallons
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Best kept in planted tanks with open swimming space and gentle flow
Behavior & Personality:
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Energetic, mid-level swimmer
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Males may perform colorful displays to impress females
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Peaceful and social—thrives in active schools
Special Notes:
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A rare and less commonly seen rainbowfish in the trade
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Benefits from clean, well-oxygenated water and regular water changes
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Best coloration is seen in mature males under good lighting
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Ideal for aquarists looking to support conservation through captive care
The Emerald Green Rainbowfish is a stunning and meaningful addition to any peaceful freshwater aquarium. Its glowing green sheen, active schooling nature, and rarity in the hobby make it a top choice for rainbowfish enthusiasts and aquascapers alike.
