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Tiger Loach (Syncrossus hymenophysa)
A boldly striped, active loach from Southeast Asia that earns its keep by hunting snails — but demands a spacious, well-oxygenated tank and a group to thrive.
Will it live with a Tiger Loach?
We compare each fish against your tiger loach on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- Banjo Catfish✅ CompatiblePeaceful · 15 cm · Medium care · 20–26 °C (68–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–26 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Bearded Corydoras✅ CompatiblePeaceful · 10 cm · Medium care · 18–24 °C (64–75 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–24 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Bristlenose Pleco✅ CompatiblePeaceful · 12 cm · Easy care · 23–30 °C (73–86 °F)
- Compatible on the things that matter: shared water near 23–27 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Clown Pleco✅ CompatiblePeaceful · 9 cm · Medium care · 24–28 °C (75–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Leopard Frog Pleco✅ CompatiblePeaceful · 9 cm · Medium care · 25–30 °C (77–86 °F)
- Compatible on the things that matter: shared water near 25–27 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Marbled Hoplo✅ CompatiblePeaceful · 14 cm · Easy care · 22–28 °C (72–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Medusa Pleco✅ CompatiblePeaceful · 12 cm · Medium care · 26–30 °C (79–86 °F)
- Compatible on the things that matter: shared water near 26–27 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Porthole Catfish✅ CompatiblePeaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 23–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Rubber Lip Pleco✅ CompatiblePeaceful · 12 cm · Easy care · 20–26 °C (68–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Snowball Pleco✅ CompatiblePeaceful · 16 cm · Medium care · 24–30 °C (75–86 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 24–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Spotted Rubbernose Pleco✅ CompatiblePeaceful · 12 cm · Medium care · 20–26 °C (68–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Spotted Talking Catfish✅ CompatiblePeaceful · 15 cm · Easy care · 22–26 °C (72–79 °F)
- Compatible on the things that matter: shared water near 23–26 °C, workable temperaments, and no predator-and-prey size gap.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Upside-down Catfish✅ CompatiblePeaceful · 10 cm · Easy care · 22–26 °C (72–79 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Weather Loach✅ CompatiblePeaceful · 25 cm · Easy care · 5–24 °C (41–75 °F)
- Semi-aggressive + Peaceful, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Zebra Pleco✅ CompatiblePeaceful · 10 cm · Hard care · 26–30 °C (79–86 °F)
- Semi-aggressive + Peaceful, but with no direct clash here, and their water overlaps around 26–27 °C — no size, zone or temperament conflicts.
- Both favour the bottom of the tank — offer enough cover so they aren't always in each other's space.
- Altifrons Geophagus⚠️ With cautionSemi-aggressive · 25 cm · Medium care · 24–28 °C (75–82 °F)
- Tiger Loach and Altifrons Geophagus can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 200 L tank is below the ~378 L this pairing really wants — crowding raises aggression.
- Keep Altifrons Geophagus in a shoal of 6+ or it gets stressed and nippy.
- Angelicus Synodontis⚠️ With cautionSemi-aggressive · 25 cm · Medium care · 23–27 °C (73–81 °F)
- Tiger Loach and Angelicus Synodontis can both be territorial; doable with space and dense planting, but watch for chasing.
- Blood Parrot Cichlid⚠️ With cautionSemi-aggressive · 20 cm · Medium care · 24–28 °C (75–82 °F)
- Tiger Loach and Blood Parrot Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
- Electric Blue Acara⚠️ With cautionSemi-aggressive · 16 cm · Medium care · 22–28 °C (72–82 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Electric Blue Hap⚠️ With cautionSemi-aggressive · 20 cm · Medium care · 24–28 °C (75–82 °F)
- pH preferences only just meet (Tiger Loach 6.5–7.5 vs Electric Blue Hap 7.8–8.5) — target the overlap and acclimate slowly.
- Tiger Loach and Electric Blue Hap can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 200 L tank is below the ~250 L this pairing really wants — crowding raises aggression.
- Emperor Peacock Cichlid⚠️ With cautionSemi-aggressive · 16 cm · Medium care · 24–28 °C (75–82 °F)
- pH preferences only just meet (Tiger Loach 6.5–7.5 vs Emperor Peacock Cichlid 7.6–8.6) — target the overlap and acclimate slowly.
- Tiger Loach and Emperor Peacock Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 200 L tank is below the ~210 L this pairing really wants — crowding raises aggression.
- Fire Blue Empress Cichlid⚠️ With cautionSemi-aggressive · 18 cm · Medium care · 24–28 °C (75–82 °F)
- Tiger Loach and Fire Blue Empress Cichlid can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 200 L tank is below the ~400 L this pairing really wants — crowding raises aggression.
- Galaxy Pleco⚠️ With cautionSemi-aggressive · 25 cm · Medium care · 22–26 °C (72–79 °F)
- Tiger Loach and Galaxy Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
- Goldie Pleco⚠️ With cautionSemi-aggressive · 20 cm · Medium care · 24–29 °C (75–84 °F)
- Tiger Loach and Goldie Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
- Green Severum⚠️ With cautionSemi-aggressive · 20 cm · Medium care · 23–29 °C (73–84 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Your 200 L tank is below the ~208 L this pairing really wants — crowding raises aggression.
- Guyana Flag Cichlid⚠️ With cautionSemi-aggressive · 18 cm · Medium care · 24–30 °C (75–86 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Honeycomb Pleco⚠️ With cautionSemi-aggressive · 21 cm · Medium care · 24–29 °C (75–84 °F)
- Tiger Loach and Honeycomb Pleco can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 200 L tank is below the ~280 L this pairing really wants — crowding raises aggression.
- Platinum Acara⚠️ With cautionSemi-aggressive · 20 cm · Medium care · 23–28 °C (73–82 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Severum⚠️ With cautionSemi-aggressive · 25 cm · Medium care · 23–30 °C (73–86 °F)
- Tiger Loach and Severum can both be territorial; doable with space and dense planting, but watch for chasing.
- Your 200 L tank is below the ~280 L this pairing really wants — crowding raises aggression.
- Spanner Barb⚠️ With cautionSemi-aggressive · 18 cm · Medium care · 23–29 °C (73–84 °F)
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Your 200 L tank is below the ~208 L this pairing really wants — crowding raises aggression.
- Keep Spanner Barb in a shoal of 6+ or it gets stressed and nippy.
- Striped Raphael Catfish⚠️ With cautionSemi-aggressive · 20 cm · Medium care · 24–28 °C (75–82 °F)
- Tiger Loach and Striped Raphael Catfish can both be territorial; doable with space and dense planting, but watch for chasing.
- Alligator Gar⛔ Not recommendedAggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
- Two assertive fish, one genuinely aggressive: Tiger Loach and Alligator Gar will hold territory and clash.
- Size gap is too large (250 vs 20 cm): Alligator Gar will treat Tiger Loach as food.
- Your 200 L tank is below the ~3785 L this pairing really wants — crowding raises aggression.
- Clown Knifefish⛔ Not recommendedAggressive · 90 cm · Hard care · 24–28 °C (75–82 °F)
- Tiger Loach and Clown Knifefish are both territorial and at least one is outright aggressive — expect serious fighting.
- Size gap is too large (90 vs 20 cm): Clown Knifefish will treat Tiger Loach as food.
- Your 200 L tank is below the ~750 L this pairing really wants — crowding raises aggression.
- Fire Eel⛔ Not recommendedSemi-aggressive · 100 cm · Medium care · 24–28 °C (75–82 °F)
- Tiger Loach is bite-sized to a 100 cm predatory fire eel — it will be eaten.
- Both are a bit pushy (semi-aggressive + semi-aggressive) — workable only in a larger tank with cover and broken sight lines.
- Your 200 L tank is below the ~380 L this pairing really wants — crowding raises aggression.
- Koi⛔ Not recommendedPeaceful · 90 cm · Medium care · 4–28 °C (39–82 °F)
- Size gap is too large (90 vs 20 cm): Koi will treat Tiger Loach as food.
- Your 200 L tank is below the ~3800 L this pairing really wants — crowding raises aggression.
- Redtail Catfish⛔ Not recommendedAggressive · 120 cm · Hard care · 24–27 °C (75–81 °F)
- Two assertive fish, one genuinely aggressive: Tiger Loach and Redtail Catfish will hold territory and clash.
- Redtail Catfish (120 cm) is big enough to swallow the 20 cm Tiger Loach whole.
- Your 200 L tank is below the ~5700 L this pairing really wants — crowding raises aggression.
- Spotted Gar⛔ Not recommendedAggressive · 90 cm · Hard care · 18–26 °C (64–79 °F)
- Two assertive fish, one genuinely aggressive: Tiger Loach and Spotted Gar will hold territory and clash.
- Tiger Loach is bite-sized to a 90 cm predatory spotted gar — it will be eaten.
- Your 200 L tank is below the ~600 L this pairing really wants — crowding raises aggression.
- Wels Catfish⛔ Not recommendedAggressive · 300 cm · Hard care · 15–25 °C (59–77 °F)
- Two assertive fish, one genuinely aggressive: Tiger Loach and Wels Catfish will hold territory and clash.
- Tiger Loach is bite-sized to a 300 cm predatory wels catfish — it will be eaten.
- Your 200 L tank is below the ~20000 L this pairing really wants — crowding raises aggression.
- Wolf Cichlid⛔ Not recommendedAggressive · 72 cm · Hard care · 24–30 °C (75–86 °F)
- Tiger Loach and Wolf Cichlid are both territorial and at least one is outright aggressive — expect serious fighting.
- Tiger Loach is bite-sized to a 72 cm predatory wolf cichlid — it will be eaten.
- Your 200 L tank is below the ~760 L this pairing really wants — crowding raises aggression.
Compatibility is computed from each species' care data — a strong starting point, not a guarantee. Individual temperament varies, so always introduce new fish slowly and watch them.
Tiger Loach care specs
- Care level
- Medium
- Breeding
- Very Hard
- Max size
- 20 cm (7.9 in)
- Min tank size
- 200 L (52.8 gal)
- Temperature
- 23–27 °C (73–81 °F)
- pH
- 6.5–7.5
- Hardness
- 3–12 dGH
- Lifespan
- 8–15 years
- Diet
- Carnivore
- Swim level
- Bottom
- Group size
- 5+ (shoaling)
- Family
- Botiidae
- Origin
- Southeast Asia — Malay Peninsula, Borneo, Sumatra, Thailand
What is a Tiger Loach?
The Tiger Loach (Syncrossus hymenophysa) is a large, striking botiid loach native to the rivers and streams of the Malay Peninsula, Borneo, Sumatra and Thailand. Its cream-to-amber body carries bold, dark-brown vertical bands that can number a dozen or more across the flanks, earning it its common name and making it one of the more visually dramatic bottom-dwellers available in the freshwater hobby. Adults routinely reach 18–20 cm (7–8 in), putting it firmly in the “large loach” category alongside its more widely kept cousin, the Clown Loach.
Despite superficial similarities to other botiids, the Tiger Loach has its own character: more slender in profile than the Clown Loach, faster-moving, and noticeably more assertive in the social hierarchy of a mixed tank. It is also known under the trade names Banded Loach and Reticulate Loach, and is occasionally mislabelled in the trade. Keeping it well requires real commitment — a large, well-filtered tank, a proper social group, and appropriate water chemistry — but in the right setup it is a bold, active display fish and an effective biological solution to unwanted snail populations.
Where does the Tiger Loach come from?
In the wild, Syncrossus hymenophysa inhabits fast-flowing rivers, hill streams and their associated tributaries across the Malay Peninsula, Borneo, Sumatra and Thailand. These waterways are typically clear to mildly tannin-stained, well-oxygenated by current and broken substrate, moderately soft and slightly acidic — conditions that reflect the fish’s position in the pH range of 6.5–7.5 and hardness of 3–12 dGH.
The natural riverbed is composed of smooth rocks, cobble, sand and leaf litter, with driftwood and root tangles providing shelter. Current is a significant feature: Tiger Loaches are built for moving water, and a stagnant, poorly oxygenated aquarium will stress them in ways that show up first as lethargy and later as disease. Understanding their origin — oxygen-rich, slightly acidic, moderately soft hill-stream habitat — is the single most useful frame for setting up a successful Tiger Loach tank.
What size tank does a Tiger Loach need?
The minimum starting point is 200 litres (about 53 gallons), and that is genuinely a minimum for a group of five juveniles. Adults at 20 cm (8 in) apiece produce significant waste and need meaningful open-water swimming lanes in addition to shelter zones, so a 300–400 L (80–105 gal) tank gives a group of five to six much more workable space over the long term.
Tank footprint matters more than height. A long, wide tank — 120 cm (48 in) or more in length — allows the fish to patrol naturally and helps the group establish a stable social order. Depth is less critical; Tiger Loaches are bottom-dwellers and rarely venture into the upper column. Substrate should be fine or smooth-grade gravel or sand to protect the delicate barbels they use when foraging. Sharp-edged gravel will cause barbel erosion and subsequent bacterial infections. Round river pebbles, smooth slate and driftwood complete a natural-feeling environment. Leave a notable area of open, uncluttered substrate where the fish can gather and interact — this is as important to their wellbeing as the caves and hides they retreat to.
A tight-fitting lid is mandatory. Tiger Loaches are capable jumpers, particularly when startled or when first introduced to a new tank.
What water parameters do Tiger Loaches need?
- Temperature: 23–27 °C (73–81 °F)
- pH: 6.5–7.5
- Hardness: 3–12 dGH
- Oxygen: High — surface agitation and a well-rated filter are both necessary.
Stability is essential. These fish are long-lived — 8 to 15 years is realistic — and chronic low-level stress from fluctuating parameters will shorten that lifespan considerably. Weekly water changes of 25–30 % are a baseline; in a heavily stocked tank, more frequent changes may be needed to keep nitrate in check. Strong mechanical and biological filtration is non-negotiable given the fish’s size and appetite. Running two filters, or an oversized canister, provides both the flow rate and the redundancy this species warrants.
Avoid hard alkaline water. The upper end of the hardness range (12 dGH) is a ceiling, not a target; softer water in the 4–8 dGH range is preferable for long-term health.
What do Tiger Loaches eat?
Tiger Loaches are carnivores with a strong drive to forage the substrate. In practice they eat almost anything meaty: high-quality sinking pellets and wafers form a reliable staple, supplemented regularly with frozen foods — bloodworms, daphnia, brine shrimp and mussel are all accepted. Live or frozen blackworm is particularly relished and useful for conditioning.
Their signature skill is snail predation. They will systematically clear Malaysian trumpet snails, ramshorn snails and other soft-shelled pest species from the substrate, crushing and extracting them with their subterminal mouths and the sharp suborbital spine characteristic of botiid loaches. Do not rely on snails as the sole protein source, but do factor in that ornamental snails — mystery snails, nerite snails — will not survive in the same tank.
Feed once or twice daily, offering enough sinking food that every fish in the group gets access before it is consumed. In a competitive group, subordinate individuals can be undersized if feeding is concentrated in one spot — scatter food or use multiple feeding zones.
Are Tiger Loaches aggressive — and what fish can live with them?
Tiger Loaches carry a semi-aggressive temperament, and their social dynamics within the group are important to understand. A group of fewer than five will often channel dominance aggression outward, toward other tank residents. A properly sized group of five or more establishes an internal hierarchy that keeps most of that energy within the loach pecking order, resulting in a calmer community tank overall.
Within the group, chasing, nipping and physical posturing are normal — the fish click audibly when competing, which is characteristic of the family. Occasional minor fin damage is expected in a new group and typically heals without intervention once ranks are settled.
Suitable tank-mates are robust, fast-moving mid-to-upper-column fish of similar or larger size: larger barb species (Denison barb, tinfoil barb), medium to large tetras, robust danios, and peaceful mid-water cichlids that share the water chemistry requirements. Avoid small or slow-moving fish, very long-finned species, and anything small enough to be viewed as food. Dwarf shrimp will not survive. Ornamental snails will not survive.
For a detailed, filterable pairing guide, see Tiger Loach tank mates.
How do you tell a male Tiger Loach from a female?
Sexing Syncrossus hymenophysa outside breeding condition is difficult and often unreliable. Females in breeding condition are noticeably broader and more robust through the belly, reflecting developing eggs. Males remain slimmer and more streamlined. Outside of this period the difference is subtle and largely invisible to all but the most experienced eye.
For practical purposes, purchase a group of six or more juveniles from a reputable source and allow natural pairing to occur. There is no reliable external marker in juveniles. The spine beneath the eye — the suborbital spine, a defining characteristic of the family — is present in both sexes and is not a useful dimorphic indicator.
How do Tiger Loaches breed?
Breeding Syncrossus hymenophysa in captivity is rated very hard and has been achieved only rarely outside specialist facilities. The species likely undergoes seasonal migrations in the wild, triggered by shifts in rainfall, water temperature and flow — conditions difficult to replicate precisely in the home aquarium.
In principle, triggering spawning requires conditioning a group with live and frozen foods, manipulating temperature downward and then upward in a controlled cycle, and providing high oxygenation and strong flow. Eggs are scattered and receive no parental care; adults may consume them. Even if spawning is achieved, raising the fry to a viable size requires dedicated facilities and live foods. For most hobbyists, the focus should be on maintaining a healthy, well-socialised adult group rather than attempting captive breeding.
What diseases are common in Tiger Loaches?
Tiger Loaches share the sensitivity to disease common across scaleless and thin-scaled botiid loaches. The most frequently encountered problems are:
- Ich (white spot): Small white cysts on the body and fins. Often triggered by a temperature drop, new fish introductions or stress. Prevention — stable heat, quarantine of new arrivals, avoiding sudden chills — is far more effective than treatment. Note that botiids are sensitive to standard ich treatments at full dose; always research dosing adjustments before medicating.
- Fin and barbel rot: Bacterial infection of the fins or the delicate barbels, almost always linked to sharp substrate, poor water quality or injuries from tank-mate aggression. Prevention: smooth substrate, strong filtration, regular water changes.
- Skinny disease / internal parasites: Wasting despite a good appetite can indicate internal parasites, particularly in wild-caught specimens. Quarantine all new fish and observe feeding behaviour and body condition over several weeks before adding to the display tank.
- Oxygen stress: Not a disease, but easily confused with one. Gasping at the surface, lethargy and gathering near the filter outlet signal insufficient oxygenation. Increase surface agitation immediately.
Health note: medication dosing and specific disease diagnosis are beyond the scope of a care profile. Botiid loaches are known to be sensitive to many common aquarium medications — always consult a veterinary or specialist fish-health source and verify appropriate dosing before treating.
How long do Tiger Loaches live?
With good care, 8 to 15 years is a realistic lifespan for Syncrossus hymenophysa. This is a substantial long-term commitment — longer than most aquarium fish kept in the hobby, and longer than many common pets. Before acquiring a group, consider whether the tank setup, ongoing maintenance and the long-term plan for the fish can realistically be sustained.
The fish sold in the trade are usually juveniles well under their adult size, so years of growth lie ahead. A Tiger Loach purchased at 5–8 cm (2–3 in) may reach its full 20 cm (8 in) over two to three years and then remain a central feature of the tank for a decade or more. That longevity, combined with the bold patterning and active personality of a well-kept group, is what makes this species a genuinely rewarding choice for the experienced hobbyist willing to meet its demands.
Frequently asked questions
Is the Tiger Loach the same as the Clown Loach?
No. Both are in family Botiidae, but the Tiger Loach (Syncrossus hymenophysa) is a distinct, slimmer species with finer banding and a generally more territorial personality than the social Clown Loach (Chromobotia macracanthus). They should not be confused in care requirements.
Will a Tiger Loach eat my snails?
Yes — like most botiid loaches, it is an enthusiastic snail hunter and will root out Malaysian trumpet snails, ramshorn snails and similar pest species. Do not keep it with valued ornamental snails such as mystery or nerite snails.
What you need to keep a tiger loach
The baseline is a heated, filtered 200 L+ tank: a reliable heater to hold 23–27 °C (73–81 °F), a gentle filter that won't batter a tiger loach in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
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