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.
Odessa Barb At a Glance
Odessa Barb Tank Requirements
Will Odessa Barb fit in your tank?
Care guides tell you what Odessa Barb needs, the next question is whether your tank can safely provide it. Test Odessa Barb against your tank size, maintenance needs, and the fish you already keep before you buy.
Odessa Barb Water Parameters
Odessa Barb Temperament & Compatibility
Odessa Barb Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard (Mixed Sex)
Standard commercial offering, usually sold as unsexed juveniles or mixed sex adults. It is highly recommended to keep a mixed ratio, as males will display their most vivid red coloring when competing for the attention of the silvery, plumper females.
Differs in 1 trait from base species
Also known as: Mixed Group, School
Odessa Barb Care Guide Summary
The Odessa Barb, scientifically known as Pethia padamya, belongs to the Cyprinids family group. Adults reach a maximum size of approximately 5 cm and have a fusiform 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 Odessa Barb requires a freshwater only aquarium with a minimum volume of 80 litres and a tank length of at least 80 cm. Water temperature should be maintained between 16°C and 26°C, with a pH range of 6.5–8.5 and a general hardness of 5–20 dGH. A moderate water flow is preferred.
The Odessa Barb is a rewarding species to keep, provided its core environmental needs are met. The Odessa Barb is typically available in one standard form.
Odessa Barb Habitat Setup
When setting up an aquarium for the Odessa 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 dense planting to provide cover, break sightlines, and reduce stress.
Odessa Barb Compatibility Notes
Classified as mostly peaceful, the Odessa 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.
Who Odessa Barb Is Actually For
Odessa Barb is best for a fishkeeper who wants a species that can settle into a calmer community setup and can provide a keeper who can commit to a proper group of at least 6. It makes the most sense for a hobbyist who will actually build around its needs, especially plants.
The most common mistake is buying Odessa Barb for looks first and only later discovering how its adult size, behavior, or bioload changes the whole tank plan. Another frequent problem is underestimating its social needs. A token pair or trio often behaves very differently from a real group.
Odessa Barb Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Odessa Barb.
30 Gallon Breeder
40 Gallon Breeder
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
Show 12 more tank sizes
Frequently Asked Questions About Odessa Barb
How big does Odessa Barb get?
Odessa Barb (Pethia padamya) typically reaches a maximum adult size of approximately 5 cm. They have a fusiform body shape and a moderate growth rate.
What tank size does Odessa Barb need?
A minimum aquarium volume of 80 litres and a tank length of at least 80 cm are recommended for Odessa Barb. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Odessa Barb need?
Odessa Barb thrives in freshwater only conditions with a temperature range of 16–26°C, a pH between 6.5 and 8.5, and a general hardness of 5–20 dGH. A moderate water flow is preferred.
Is Odessa Barb peaceful or aggressive?
Odessa 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 Odessa Barb should be kept together?
Odessa 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 Odessa Barb have any special tank requirements?
Yes. Odessa Barb benefits from plants - densely covered in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Useful setup supplies
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Guidarium Editorial Desk
Reviewed against Guidarium care, stocking, and compatibility standards. Read the editorial policy.
- Last reviewed
- April 28, 2026
- Last updated
- April 28, 2026
- Issues or corrections?
- Contact the editorial team
Top Tank Mates for Odessa Barb
These fish are strong compatibility matches for Odessa 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 MatesKabia rainbowfish
Glossolepis kabia
Ideal Tank MatesScissortail Rasbora
Rasbora trilineata
Ideal Tank MatesRummynose Rasbora
Sawbwa resplendens
Ideal Tank MatesPlants That Suit Odessa Barb
These plants pair well with Odessa 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 Odessa Barb
Rosy Barb
Pethia conchonius
A hardy, active, and colorful subtropical schooling fish. Known for the male's striking rosy-red breeding dress, while females are more golden/silver. They are voracious eaters, very active swimmers, and can be fin-nippers if kept in too small a group. Best kept in cooler water compared to tropical species. The Long Finned morph is also popular but requires gentler flow.
Arulius Barb
Dawkinsia arulius
A robust, highly active schooling fish native to the fast-flowing rivers of southern India. Known for their striking vertical bars and the beautiful dorsal fin extensions developed by mature males. Because of their energetic swimming habits and size, they require highly oxygenated water, decent current, and a spacious aquarium with plenty of horizontal swimming room.
Melon Barb
Haludaria fasciata
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.
Rhomb Barb
Desmopuntius rhomboocellatus
A striking, peaceful schooling fish from the peat swamps of Borneo. Known for the distinctive snake-skin or rhomboid markings on its flanks. Unlike the related Tiger Barb, it is completely peaceful and somewhat shy, requiring heavily planted tanks with tannin-stained (blackwater) conditions to feel secure and show its best reddish-orange colors.
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.
Barred Rainbowfish
Chilatherina fasciata
A robust, active, and highly colorful schooling fish native to the clear, fast-flowing streams of New Guinea. They are named for the distinctive vertical black bars on their lower flanks. As highly active swimmers that do best in hard, alkaline water, they require a spacious, long aquarium (minimum 4 feet) with strong oxygenation and plenty of open swimming space.