An active, schooling cyprinid endemic to the flowing rivers of Southern India. They are named for the stunning red/pink 'melon' coloration males develop, which contrasts beautifully with their dark vertical bands. They are energetic swimmers that require plenty of open swimming space and must be kept in groups to curb potential fin-nipping behavior.
Melon Barb At a Glance
Melon Barb Tank Requirements
Will Melon Barb fit in your tank?
Care guides tell you what Melon Barb needs, the next question is whether your tank can safely provide it. Test Melon Barb against your tank size, maintenance needs, and the fish you already keep before you buy.
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Melon Barb Water Parameters
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Melon Barb Temperament & Compatibility
Melon Barb Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Male
Slightly slimmer than females. Males develop a brilliant crimson or 'melon' pink flush across their body, especially when competing for dominance or in breeding condition.
Differs in 1 trait from base species
Also known as: Male Melon Barb
Female
Noticeably fuller-bodied and generally slightly larger. Their base color remains a yellowish-silver with bold black bars, lacking the intense red flush of the males.
Differs in 1 trait from base species
Also known as: Female Melon Barb
Melon Barb Care Guide Summary
The Melon Barb, scientifically known as Haludaria fasciata, belongs to the Cyprinids family group. Adults reach a maximum size of approximately 7 cm and have a compressed body shape with a moderate growth rate. Classified as mostly peaceful, this species primarily occupies the mid-level and bottom zones of the aquarium and produces a low level of biological waste.
To thrive, the Melon Barb requires a freshwater only aquarium with a minimum volume of 110 litres and a tank length of at least 90 cm. Water temperature should be maintained between 22°C and 26°C, with a pH range of 6–7.5 and a general hardness of 2–15 dGH. A moderate water flow is preferred.
The Melon Barb is a rewarding species to keep, provided its core environmental needs are met. This species is available in 2 varieties: Male and Female. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Melon Barb Habitat Setup
When setting up an aquarium for the Melon Barb, a moderate water flow best suits their natural preferences. Because this species occupies the mid-level and bottom zones, the aquarium layout should prioritise open swimming space in the centre of the tank for free movement and sufficient floor space with hiding spots among rocks, wood, or dense planting. Useful additions include driftwood, which can serve as both a hiding place and a dietary supplement and dense planting to provide cover, break sightlines, and reduce stress. Keepers should note that a tight-fitting lid is essential, as this species is a known jumper.
Melon Barb Compatibility Notes
Classified as mostly peaceful, the Melon Barb is a schooling species that feels most secure in a sizeable group, where natural shoaling behaviour reduces stress and brings out their best colours. When choosing tankmates, avoid housing with slow-moving or long-finned species that may become targets for fin nipping and their energetic swimming style may stress more sedentary or timid species. Selecting tankmates that favour different water layers from the mid-level and bottom zones can help reduce competition and territorial overlap.
Melon Barb Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Melon Barb.
30 Gallon Breeder
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
Show 10 more tank sizes
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Frequently Asked Questions About Melon Barb
How big does Melon Barb get?
Melon Barb (Haludaria fasciata) typically reaches a maximum adult size of approximately 7 cm. They have a compressed body shape and a moderate growth rate.
What tank size does Melon Barb need?
A minimum aquarium volume of 110 litres and a tank length of at least 90 cm are recommended for Melon Barb. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Melon Barb need?
Melon Barb thrives in freshwater only conditions with a temperature range of 22–26°C, a pH between 6 and 7.5, and a general hardness of 2–15 dGH. A moderate water flow is preferred.
Is Melon Barb peaceful or aggressive?
Melon Barb is classified as mostly peaceful with an aggression score of 3 out of 10. They are generally well-suited to peaceful community tanks.
How many Melon Barb should be kept together?
Melon Barb is a schooling species and should be kept in groups of at least 6. Larger groups help distribute aggression and encourage natural schooling behaviour.
Does Melon Barb have any special tank requirements?
Yes. Melon Barb benefits from plants - densely covered and driftwood (digestion/hiding) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Does Melon Barb need a lid on the tank?
Yes. Melon Barb is a known jumper, and a tight-fitting lid or cover is essential to prevent escape. Even a small gap can be enough for a determined fish to leap out.
Top Tank Mates for Melon Barb
These fish are strong compatibility matches for Melon Barb based on water preferences, temperament, adult size, and tank behavior.
Celebes Halfbeak
Nomorhamphus liemi
Ideal Tank MatesWrestling Halfbeak
Dermogenys pusilla
Ideal Tank MatesJapanese Ricefish (Medaka)
Oryzias latipes
Ideal Tank MatesPygmy Rainbowfish
Melanotaenia pygmaea
Ideal Tank MatesPacific Blue Eye
Pseudomugil signifer
Ideal Tank MatesOgilby's Rainbowfish
Melanotaenia ogilbyi
Ideal Tank MatesPlants That Suit Melon Barb
These plants pair well with Melon Barb based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
Afzel's Anubias
Anubias afzelii
Amazon Sword
Echinodorus amazonicus
Anacharis
Egeria densa
Anubias Barteri
Anubias barteri
Baby Tears
Lindernia rotundifolia
Balansae
Cryptocoryne crispatula
Fish Similar to Melon Barb
Cherry Barb
Puntius titteya
A peaceful, schooling cyprinid endemic to the shaded streams of Sri Lanka. Unlike many of its barb cousins, the Cherry Barb is not a fin-nipper and makes an excellent community fish. They thrive in heavily planted aquariums with subdued lighting and leaf litter. Males display a striking cherry-red color, especially during spawning.
Chinese Barb (Green Barb)
Puntius semifasciolatus
A hardy, active, and peaceful schooling cyprinid originally from the Red River basin in Asia. While the wild form is a metallic green/silver, a highly popular selectively bred yellow morph (the 'Gold Barb') dominates the aquarium trade. They are distinctly subtropical and thrive in unheated or cooler water setups.
Tiger Barb
Puntigrus tetrazona
A highly active, schooling cyprinid famous for its striking black stripes and infamous reputation as a fin-nipper. They are boisterous and must be kept in larger groups (6+) to keep their pecking order internal. They should never be housed with slow-moving or long-finned tankmates like Bettas, Guppies, or Angelfish.
Denison Barb (Roseline Shark)
Sahyadria denisonii
An endangered, stunningly colored cyprinid endemic to the fast-flowing streams of the Western Ghats in India. Characterized by a torpedo-shaped body with a striking red line and black stripe. They are highly active, fast swimmers that require highly oxygenated water, strong flow, and cooler tropical temperatures. They are strictly shoaling fish and can be skittish if kept in small numbers.
Odessa Barb
Pethia padamya
A highly active, stunning schooling fish known for the brilliant red lateral stripe running across the males. Originating from central Myanmar, they thrive in slightly cooler, sub-tropical water compared to typical tropical fish. They are robust and peaceful when kept in proper shoals, but may nip fins if stressed or kept in numbers too small.
Five Banded Barb
Desmopuntius pentazona
A small, peaceful, and beautifully colored schooling cyprinid native to the blackwater peat swamps of Southeast Asia. Often confused with the much more aggressive Tiger Barb, the Five Banded Barb is entirely peaceful and will not nip fins. They are somewhat shy and require a well-planted tank with dim lighting or floating plants to feel secure and show their best reddish-orange colors.