Jambi Scarlet Betta (Betta coccina)

Jambi Scarlet Betta is the trade name used for this small wild-type Betta coccina, also known as the scarlet betta or wine-red betta. It is a short-finned, naturally shaped labyrinth fish for a mature blackwater aquarium, not a long-finned domestic Betta splendens colour morph. Its best qualities are subtle red colour, iridescent detail and quiet behaviour among leaf litter, roots and shaded plants.

This is a specialist choice for an aquarist who can prepare soft, acidic water and keep it stable. A bright hard-water community, an uncycled aquarium or a small decorative bowl is not suitable. If you are comparing wild and domestic bettas, start with our Betta fish guide and range, then use the evidence and planning tables below to decide whether this species matches your water and experience.

Sale-unit clarity: each selected quantity is one unsexed live fish in the supplier's XL trade grade. XL is a supplier size band rather than a guaranteed ruler measurement, sex, adult stage or breeding condition. The fish is not sold as a pair, and selecting two does not guarantee one male and one female or that two individuals will be compatible.

What You Receive

Living fish vary. Colour intensity, iridescent markings, body condition and fin development can change with sex, maturity, mood, lighting, water chemistry and transport. Judge the product by the identity and sale-unit information above, not by an expectation that every individual will match one photograph.

Quick Care Summary

These figures are planning ranges, not targets to chase with abrupt chemical dosing. The safest aquarium is one that is fully cycled, tested and already stable before the fish arrives. Read our Betta temperature guide for heater and measurement basics, while remembering that this peat-swamp species needs softer and more acidic water than a typical domestic betta.

Is This The Right Betta For You?

The specialist label is mainly about chemistry and preparation, not about a complicated daily routine. Once a suitable aquarium is mature, maintenance should be calm and consistent: small measured water changes, low disturbance, careful feeding and regular testing. The difficult route is trying to convert unsuitable tap water with quick-fix pH products after the fish has arrived.

Identity, The Jambi Name And A 2025 Taxonomy Note

Betta coccina remains an accepted species. The Catalog of Fishes records Vierke's 1979 description, a type locality in Jambi, central Sumatra, and a broader distribution in Malaysia and Sumatra. The red body and an iridescent lateral blotch in males are useful published characters, but colour alone is not a safe way to identify every member of the coccina complex.

The word Jambi needs care. It is part of this product's established trade name, but the supplier has not supplied collection records for the current batch. We therefore do not claim that the dispatch fish was collected in Jambi, belongs to a documented Jambi population or has verified locality lineage.

This distinction became even more important after a 2025 peer-reviewed study of the Betta coccina complex described Betta iaspis from a particular Jambi peat-swamp population. That study does not justify relabelling this supplier fish; there is no specimen-level evidence for doing so. It shows why a locality word, image colour or retailer title cannot replace morphology, genetics and provenance. This listing retains the supplier's B. coccina identity while stating the uncertainty honestly.

Gallery Image Disclosure

The existing gallery image is a representative illustration created from text when no supplier photograph was available. It was not generated from a photograph of the current fish, and its exact turquoise pattern should not be used for species diagnosis or as a promise of dispatch colour.

The fish you receive may be paler after transport and can develop stronger red and iridescent colour as it settles. Sex, age, water, lighting, background and social context all affect appearance. For this reason, the scientific identity, supplier trade grade and care information are more dependable than any single representative render.

Natural Habitat And What It Means In The Aquarium

Published sources place scarlet bettas in Southeast Asian forest peat-swamp and associated blackwater habitats. Decaying leaves and wood tint the water, shade is heavy, current is weak, and dissolved minerals and carbonate buffering can be extremely low. These environments are structurally complex even when the water body looks small: leaf litter, roots, branches and marginal plants create many feeding and retreat zones.

Botanicals can provide tannins and cover, but they do not automatically turn hard tap water into safe peat-swamp water. Their effect depends on the source water's buffering capacity. Measure the actual chemistry and replace leaves in stages so that decay, colour and hiding structure change gradually.

Aquarium Size And Layout

Small adult length does not make this a bowl fish. A larger footprint gives more stable chemistry, a gentler temperature gradient, better cover and room to avoid conflict. For one fish, a mature aquarium with a base around 60 x 30 cm, commonly about 54 litres before displacement, is a sensible practical starting point. Smaller specialist setups can work in expert hands, but they leave less margin for a low-buffer chemistry error.

Use dark fine substrate, scattered leaves, branchy wood, broad-leaved and floating plants, and several shaded surface-adjacent retreats. Leave open pockets where you can see the fish eat. A secure lid is essential because bettas can jump; retain a warm, humid air space above the water and unobstructed access to the surface for labyrinth breathing. Do not seal the aquarium airtight.

Water Chemistry: Stable Beats Extreme

FishBase records pH 4.0-6.0, hardness 0-4 dH and 24-27°C. The current supplier record is broader at pH 5.0-6.5, 0-10 dGH and 24-28°C. For most prepared aquaria, pH around 5.0-6.5 and 24-27°C is the practical overlap, with genuinely soft water and minimal day-to-day movement.

If local tap water is hard, reverse-osmosis water can be the basis of a controlled recipe, but pure RO water should not be used casually. Remineralise to a repeatable target, aerate and heat new water, and record the recipe. Make small changes with water that closely matches the aquarium. The goal is repeatability, not the lowest possible pH.

Filtration, Flow And Maintenance

Use mature biological filtration with a gentle output. An air-driven sponge filter is often suitable because it provides biological surface area without turning the aquarium into a fast stream. Position the outlet so one part of the surface remains calm, while still maintaining adequate gas exchange. A labyrinth organ allows air breathing; it does not remove the need for clean, oxygenated water.

Clean filter media in removed aquarium water rather than untreated tap water, and do not replace all media at once. Siphon visible waste without stripping every leaf and surface of biofilm. In low-mineral water, test more often after maintenance, a feeding change, a filter interruption or a large botanical replacement.

Feeding A Small Wild Betta

The species is a micropredator. The TFH coccina-group account emphasises small insects, worms and crustaceans, and warns that some individuals do not accept dry food readily. Plan a varied diet before the fish arrives instead of assuming flakes will become the staple.

Feed small portions once or twice daily and watch the fish swallow them. A rounded abdomen after a modest meal is enough; persistent bloating is not a sign to feed more. Remove leftovers because a low-buffer aquarium can be unforgiving of excess organic waste. If tank mates are present, make sure the betta actually receives food rather than merely approaching the feeding area.

Behaviour, Sex And Group Management

This wild betta is generally less combative than a domestic male B. splendens, but peaceful does not mean conflict-free. Space use changes with sex, maturity, individual temperament and breeding condition. Males may defend a bubble-nest area, and a subordinate fish can be stressed without obvious torn fins.

Sex is not guaranteed at the supplier XL grade. Mature males are often more intensely coloured and can show a lateral iridescent blotch, but temporary colour, condition and the complexity of related species make photograph-based sexing unreliable. Do not use the representative gallery image to infer the sex of the fish supplied.

If keeping more than one, provide duplicate resources: several surface refuges, several dense cover zones and more than one feeding location. Watch for repeated exclusion, a fish pinned to one corner, faded colour, clamped fins or missed meals. A spare mature aquarium or divider must be ready before a multi-fish trial; separation is a normal management decision, not a failure.

Tank Mates And Compatibility

A species-focused aquarium is the clearest recommendation. Very calm, tiny soft-water fish may be possible in a larger setup, but they can compete for food or disturb nesting areas. Review our broader Betta tank-mate guide, then apply the stricter chemistry and feeding needs on this page.

For other wild-betta projects, compare the care and sale unit of Betta persephone, Betta rubra, Betta imbellis and the larger mouthbrooding Betta pugnax. These links are comparisons, not automatic tank-mate recommendations; each species has different chemistry, social and breeding requirements.

Bubble-Nesting And Breeding Context

FishBase records male care of a bubble nest. In suitable aquaria, the nest may be hidden under a leaf, among roots or near other surface cover rather than displayed in an open corner. Calm flow and floating structure are useful, but a bubble nest is not proof that two fish are compatible or that the aquarium is perfect.

This product is not sold as sexed, paired, mature or breeding-ready. Breeding should be attempted only by keepers who can maintain the required chemistry, identify aggression, prepare first foods and house adults or juveniles separately if needed. Keep lineage records where known, and never mix superficially similar coccina-complex species in a breeding project.

Arrival And The First Week

Prepare the aquarium before dispatch: cycle complete, lid fitted, temperature stable, hiding places present and test results recorded. Use the fish acclimation timer as a practical companion to the instructions supplied with the delivery. Avoid leaving a transported fish in opened shipping water for a prolonged period; follow the current retailer method and match temperature and chemistry without unnecessary delay.

Keep lighting subdued on arrival day. Give the fish access to cover and the surface, then observe breathing, posture and balance from a distance. Offer a very small familiar frozen or live food after it has settled rather than repeatedly disturbing it. Colour can be muted after transport and should not be judged immediately.

During the first week, record temperature and test ammonia, nitrite and pH. Check that the fish emerges to feed, is not trapped by current and is not being excluded by a companion. Use separate equipment for quarantine where possible. Do not medicate preventively without a diagnosis, because unnecessary treatment can add stress and interfere with biological filtration.

Health And Troubleshooting

Many apparent disease problems begin with environment or social stress. Test before treating. If a fish shows persistent laboured breathing, loss of balance, ulcers, severe swelling or progressive wasting, isolate it in suitable water and seek professional aquatic-veterinary advice.

Wild Betta Versus Domestic Betta

The comparison is not a quality ranking. Both can be excellent aquarium fish when their needs are met. It prevents a common buying error: applying generic domestic-betta advice to a peat-swamp species simply because both share the genus name.

Conservation And Responsible Provenance

FishBase reports B. coccina as Vulnerable under the global IUCN assessment dated 2018. Peat-swamp drainage, conversion and habitat degradation are serious concerns across the species complex. Never release aquarium fish or water outdoors, and do not present an undocumented trade name as a conservation locality.

The current supplier has not stated whether this batch is captive-bred or wild-caught. We therefore leave that status as unknown. Keepers who breed the fish should retain purchase dates, supplier identity, photographs and any later provenance information, and should avoid crossing it with another coccina-complex fish of uncertain identity.

Live Delivery And New-Customer Saving

Eligible livestock purchases are covered by our Live Arrival Guarantee when the current delivery, timing and evidence terms are followed. Read those terms before choosing a delivery date, especially during extreme weather. WELCOME10 gives eligible new customers 10% off their first purchase.

The live page controls are the source for current availability, price and checkout options. The care guide remains evergreen so it does not make a stale availability or dispatch-date promise.

Frequently Asked Questions

What do I receive?

Each selected quantity is one unsexed live fish in the supplier's XL trade grade. It is not a pair and no exact length, sex, adult colour or breeding condition is promised.

Does XL mean a guaranteed centimetre size?

No. XL is the supplier's trade grade. Living size varies and the supplier has not attached a fixed dispatch-length range to this variant.

Is this a domestic Siamese fighting fish?

No. It is sold as the wild-type species Betta coccina, with a natural short-finned body and specialist blackwater requirements. It should not be treated as a domestic B. splendens morph.

How large does Betta coccina grow?

FishBase records a maximum of 5.6 cm total length. The supplier data rounds the species maximum to 6 cm; individual adult size varies.

What aquarium size should I plan?

For one, a mature aquarium around a 60 x 30 cm footprint is a conservative practical start. Use at least a 75 cm-long, densely structured aquarium plus separation capacity for more than one.

What temperature does it need?

Plan around 24-27°C, measured with a reliable thermometer. Stability matters more than repeatedly adjusting within that range.

What pH and hardness should I use?

About pH 5.0-6.5 with very soft water is the practical overlap between supplier and published data. FishBase records pH 4.0-6.0 and 0-4 dH; do not pursue extreme acidity without the experience and testing to keep it stable.

Can it live in hard UK tap water?

It is not a good default choice for hard alkaline water. Test GH, KH and pH first. Where necessary, use a controlled RO-based recipe rather than sudden chemical pH reduction.

What does it eat?

Offer small carnivorous foods such as frozen cyclops, daphnia, Artemia and suitably sized insect larvae. Clean cultured live foods are valuable, while dry-food acceptance varies by individual.

Can two Betta coccina live together?

They sometimes can in a sufficiently large, structured aquarium, but two unsexed fish are not automatically a pair. Provide duplicate retreats, watch feeding and have a mature separation option ready.

Can I choose a male or female?

No. Sex is not guaranteed for this listing, and the representative image cannot be used to select or infer the fish supplied.

Is it a bubble nester?

Yes. Published species data records male care of a bubble nest, often built under leaves or among sheltered surface structure.

Is the Jambi locality verified for this fish?

No. Jambi is retained as the established trade name, but the supplier has not supplied collection or lineage records for this batch.

Is the gallery image the exact fish?

No. It is a representative illustration created without a specimen photograph. It is not a promise of exact pattern, colour, sex or individual appearance.

Why is Betta iaspis mentioned?

A 2025 scientific paper described another coccina-complex species from a particular Jambi peat swamp. It does not prove this product is that species; it explains why trade locality names are not enough for a specimen-level identification.

Do Live Arrival Guarantee and WELCOME10 apply?

Eligible livestock purchases receive Live Arrival Guarantee cover when the current terms are followed. WELCOME10 gives eligible new customers 10% off their first purchase.

Sources And Further Reading

• Eschmeyer's Catalog of Fishes: accepted identity, authority, type locality and distribution
• FishBase: size, water, air-breathing biology, bubble-nest care and conservation status
• TFH Magazine: experienced aquarium husbandry for the coccina group
• Ding et al. (2025): phylogenetic analysis of the coccina complex and description of two species