Longfin Zebra Danio (Danio rerio var. longfin) is a small, peaceful freshwater fish known for its distinctive black-and-silver striped body and elongated flowing fins. It is an active swimmer and ideal for community aquariums, adding elegance and movement.
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Longfin Zebra Danio (Danio rerio var. longfin) is a small, peaceful freshwater fish known for its distinctive black-and-silver striped body and elongated flowing fins. It is an active swimmer and ideal for community aquariums, adding elegance and movement.
Slender, torpedo-shaped body with alternating black and silver horizontal stripes. Distinctively elongated dorsal, caudal, and anal fins, giving an elegant, flowing appearance. Males are slimmer with more pronounced stripes; females are rounder and paler.
3–5 years with proper care
Omnivorous; feeds on high-quality flakes, micro pellets, frozen foods, and live foods such as daphnia, brine shrimp, and micro worms. Occasional blanched vegetables like spinach or zucchini support health and enhance coloration.
Longfin Zebra Danios are excellent for community aquariums, combining peaceful schooling behavior with the elegance of flowing fins. They are visually striking and active swimmers, making them a favorite among hobbyists.
Beginner to Intermediate – hardy, but long fins require monitoring for fin-nipping and water quality.
15+ gallons (for a small school)
6.5 to 7.5
5–12 dGH
68–78°F (20–26°C)
2.5 inches
Small tetras, Rasboras, other Danios, Corydoras, peaceful barbs. Avoid aggressive or fin-nipping species.
Large, aggressive, or slow-moving fish that may stress them or nip their long fins.
Danio rerio var. longfin
Cyprinidae
South Asia – India and Bangladesh; slow-moving streams, rivers, and rice paddies.
Highly social; best kept in schools of 6 or more. Peaceful and compatible with other small community fish.
Feed 2–3 times daily with flakes, micro pellets, frozen/live foods. Supplement occasionally with finely chopped or blanched vegetables to enhance coloration and fin health.
Egg-scatterer; deposits eggs over plants or spawning mops. Adults do not guard eggs. Condition males and females with protein-rich foods before spawning. Fry feed on infusoria or newly hatched brine shrimp.
pH: 6.5–7.5, Temperature: 68–78°F (20–26°C), Hardness: 5–12 dGH, Ammonia/Nitrite: 0 ppm, Nitrate: <20 ppm
Prone to fin rot, stress, ich, and bacterial infections if water quality is poor or they are kept with fin-nipping tankmates. Maintain clean water and appropriate school sizes.
Peaceful, social, and active. Best kept in schools of 6 or more to encourage natural schooling behavior. Compatible with other small, non-aggressive community fish. Highly energetic and enjoys open swimming areas.
Native to South Asia, primarily India and Bangladesh, Longfin Zebra Danios inhabit slow-moving streams, rivers, and rice paddies. Adults reach up to 2.5 inches, with flowing fins that make them visually distinct from standard Zebra Danios. They thrive in planted aquariums with moderate water flow and plenty of open swimming areas. Ideal for beginner to intermediate aquarists due to their hardiness, peaceful behavior, and striking appearance.