Striped Eel Loach (Pangio anguillaris)
A serpentine, bottom-dwelling loach that weaves through substrate and roots — surprisingly active once settled into a soft, well-planted tank.
Will it live with a Striped Eel Loach?
We compare each fish against your striped eel loach on temperament, size, water parameters and swimming zone. Set your tank size and filter the results.
- Agassiz's Dwarf Cichlid✅ CompatibleSemi-aggressive · 9 cm · Medium care · 24–30 °C (75–86 °F)
- Peaceful + Semi-aggressive, 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.
- Banded Gourami✅ CompatibleSemi-aggressive · 12 cm · Easy care · 22–28 °C (72–82 °F)
- Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Banjo Catfish✅ CompatiblePeaceful · 15 cm · Medium care · 20–26 °C (68–79 °F)
- Both are peaceful, and their water overlaps around 24–26 °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)
- Compatible on the things that matter: shared water near 24–24 °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.
- Keep Bearded Corydoras in a shoal of 6+ or it gets stressed and nippy.
- Brilliant Rasbora✅ CompatiblePeaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Brilliant Rasbora in a shoal of 6+ or it gets stressed and nippy.
- Bristlenose Pleco✅ CompatiblePeaceful · 12 cm · Easy care · 23–30 °C (73–86 °F)
- Both are peaceful, and their water overlaps around 24–28 °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.
- Burmese Loach✅ CompatiblePeaceful · 9 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 24–28 °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.
- Clown Pleco✅ CompatiblePeaceful · 9 cm · Medium care · 24–28 °C (75–82 °F)
- Both are peaceful; 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.
- Giant Betta✅ CompatiblePeaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Giant Kuhli Loach✅ CompatiblePeaceful · 12 cm · Easy care · 24–30 °C (75–86 °F)
- Both are peaceful, and their water overlaps around 24–28 °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.
- Golden Wonder Killifish✅ CompatibleSemi-aggressive · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Keyhole Cichlid✅ CompatiblePeaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Kribensis✅ CompatibleSemi-aggressive · 10 cm · Easy care · 24–27 °C (75–81 °F)
- Peaceful + Semi-aggressive, 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.
- Kuhli Loach✅ CompatiblePeaceful · 10 cm · Easy care · 24–30 °C (75–86 °F)
- Both are peaceful; 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.
- Marbled Hoplo✅ CompatiblePeaceful · 14 cm · Easy care · 22–28 °C (72–82 °F)
- Both are peaceful, and their water overlaps around 24–28 °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.
- Molly✅ CompatiblePeaceful · 10 cm · Easy care · 23–28 °C (73–82 °F)
- Both are peaceful, and their water overlaps around 24–28 °C — no size, zone or temperament conflicts.
- Murray River Rainbowfish✅ CompatiblePeaceful · 11 cm · Easy care · 15–26 °C (59–79 °F)
- Compatible on the things that matter: shared water near 24–26 °C, workable temperaments, and no predator-and-prey size gap.
- Keep Murray River Rainbowfish in a shoal of 6+ or it gets stressed and nippy.
- Paradise Fish✅ CompatibleAggressive · 10 cm · Medium care · 16–26 °C (61–79 °F)
- Peaceful + Aggressive, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Porthole Catfish✅ CompatiblePeaceful · 10 cm · Easy care · 22–28 °C (72–82 °F)
- Compatible on the things that matter: shared water near 24–28 °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.
- Rosy Barb✅ CompatibleSemi-aggressive · 10 cm · Easy care · 18–26 °C (64–79 °F)
- Peaceful + Semi-aggressive, but with no direct clash here, and their water overlaps around 24–26 °C — no size, zone or temperament conflicts.
- Keep Rosy Barb in a shoal of 6+ or it gets stressed and nippy.
- Spotted Rubbernose Pleco✅ CompatiblePeaceful · 12 cm · Medium care · 20–26 °C (68–79 °F)
- Both are peaceful, and their water overlaps around 24–26 °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.
- Tiger Betta✅ CompatibleSemi-aggressive · 11 cm · Hard care · 22–27 °C (72–81 °F)
- Peaceful + Semi-aggressive, but with no direct clash here; temperature, pH and hardness ranges all overlap and neither outsizes the other enough to be a threat.
- Topaz Cichlid✅ CompatibleSemi-aggressive · 10 cm · Medium care · 23–28 °C (73–82 °F)
- Compatible on the things that matter: shared water near 24–28 °C, workable temperaments, and no predator-and-prey size gap.
- Zebra Pleco✅ CompatiblePeaceful · 10 cm · Hard care · 26–30 °C (79–86 °F)
- Compatible on the things that matter: shared water near 26–28 °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.
- Arrowhead Puffer⚠️ With cautionAggressive · 12 cm · Hard care · 23–28 °C (73–82 °F)
- Your 95 L tank is below the ~132 L this pairing really wants — crowding raises aggression.
- Auratus Cichlid⚠️ With cautionAggressive · 11 cm · Medium care · 23–28 °C (73–82 °F)
- Different pH ranges (6–7.2 vs 7.6–8.8); doable if you sit in the shared band, but not ideal long-term.
- Your 95 L tank is below the ~190 L this pairing really wants — crowding raises aggression.
- Keep Auratus Cichlid in a shoal of 6+ or it gets stressed and nippy.
- Blue Gourami⚠️ With cautionSemi-aggressive · 13 cm · Easy care · 22–28 °C (72–82 °F)
- Your 95 L tank is below the ~113 L this pairing really wants — crowding raises aggression.
- Bucktooth Tetra⚠️ With cautionAggressive · 12 cm · Medium care · 23–28 °C (73–82 °F)
- Your 95 L tank is below the ~200 L this pairing really wants — crowding raises aggression.
- Keep Bucktooth Tetra in a shoal of 8+ or it gets stressed and nippy.
- Cupid Cichlid⚠️ With cautionSemi-aggressive · 12 cm · Medium care · 24–29 °C (75–84 °F)
- Your 95 L tank is below the ~110 L this pairing really wants — crowding raises aggression.
- Ice Blue Cichlid⚠️ With cautionAggressive · 12 cm · Medium care · 24–28 °C (75–82 °F)
- pH preferences only just meet (Striped Eel Loach 6–7.2 vs Ice Blue Cichlid 7.6–8.6) — target the overlap and acclimate slowly.
- Your 95 L tank is below the ~190 L this pairing really wants — crowding raises aggression.
- Mascara Barb⚠️ With cautionPeaceful · 12 cm · Medium care · 20–25 °C (68–77 °F)
- Your 95 L tank is below the ~200 L this pairing really wants — crowding raises aggression.
- Keep Mascara Barb in a shoal of 8+ or it gets stressed and nippy.
- Medusa Pleco⚠️ With cautionPeaceful · 12 cm · Medium care · 26–30 °C (79–86 °F)
- Your 95 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
- Pearl Gourami⚠️ With cautionPeaceful · 12 cm · Medium care · 24–28 °C (75–82 °F)
- Your 95 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
- Pictus Catfish⚠️ With cautionSemi-aggressive · 12 cm · Medium care · 22–27 °C (72–81 °F)
- Your 95 L tank is below the ~210 L this pairing really wants — crowding raises aggression.
- Polka-dot Loach⚠️ With cautionSemi-aggressive · 13 cm · Medium care · 24–28 °C (75–82 °F)
- Your 95 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- Powder Blue Cichlid⚠️ With cautionSemi-aggressive · 12 cm · Medium care · 24–28 °C (75–82 °F)
- pH preferences only just meet (Striped Eel Loach 6–7.2 vs Powder Blue Cichlid 7.5–8.5) — target the overlap and acclimate slowly.
- Your 95 L tank is below the ~170 L this pairing really wants — crowding raises aggression.
- Keep Powder Blue Cichlid in a shoal of 6+ or it gets stressed and nippy.
- Red Zebra Cichlid⚠️ With cautionAggressive · 13 cm · Medium care · 23–28 °C (73–82 °F)
- pH preferences only just meet (Striped Eel Loach 6–7.2 vs Red Zebra Cichlid 7.6–8.6) — target the overlap and acclimate slowly.
- Your 95 L tank is below the ~190 L this pairing really wants — crowding raises aggression.
- Keep Red Zebra Cichlid in a shoal of 6+ or it gets stressed and nippy.
- Rubber Lip Pleco⚠️ With cautionPeaceful · 12 cm · Easy care · 20–26 °C (68–79 °F)
- Your 95 L tank is below the ~115 L this pairing really wants — crowding raises aggression.
- T-bar Cichlid⚠️ With cautionSemi-aggressive · 12 cm · Medium care · 22–28 °C (72–82 °F)
- Your 95 L tank is below the ~120 L this pairing really wants — crowding raises aggression.
- White Spotted Cichlid⚠️ With cautionAggressive · 12 cm · Hard care · 24–28 °C (75–82 °F)
- Different pH ranges (6–7.2 vs 7.8–9); doable if you sit in the shared band, but not ideal long-term.
- Your 95 L tank is below the ~200 L this pairing really wants — crowding raises aggression.
- Keep White Spotted Cichlid in a shoal of 8+ or it gets stressed and nippy.
- Alligator Gar⛔ Not recommendedAggressive · 250 cm · Hard care · 24–28 °C (75–82 °F)
- Alligator Gar (250 cm) is big enough to swallow the 12 cm Striped Eel Loach whole.
- Your 95 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)
- Striped Eel Loach is bite-sized to a 90 cm predatory clown knifefish — it will be eaten.
- Your 95 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)
- Fire Eel (100 cm) is big enough to swallow the 12 cm Striped Eel Loach whole.
- Your 95 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 12 cm): Koi will treat Striped Eel Loach as food.
- Your 95 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)
- Striped Eel Loach is bite-sized to a 120 cm predatory redtail catfish — it will be eaten.
- Your 95 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)
- Spotted Gar (90 cm) is big enough to swallow the 12 cm Striped Eel Loach whole.
- Your 95 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)
- Wels Catfish (300 cm) is big enough to swallow the 12 cm Striped Eel Loach whole.
- Your 95 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)
- Wolf Cichlid (72 cm) is big enough to swallow the 12 cm Striped Eel Loach whole.
- Your 95 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.
Striped Eel Loach care specs
- Care level
- Medium
- Breeding
- Hard
- Max size
- 12 cm (4.7 in)
- Min tank size
- 95 L (25.1 gal)
- Temperature
- 24–28 °C (75–82 °F)
- pH
- 6–7.2
- Hardness
- 2–10 dGH
- Lifespan
- 5–10 years
- Diet
- Omnivore
- Swim level
- Bottom
- Group size
- 4+ (shoaling)
- Family
- Cobitidae
- Origin
- Southeast Asia — Malay Peninsula and Sarawak, Borneo
What is a Striped Eel Loach?
The Striped Eel Loach (Pangio anguillaris) is a sinuous, serpentine member of the true loach family Cobitidae, distinguished by a single, unbroken dark lateral stripe that runs cleanly from snout to tail base across a pale grey-cream body. At up to 12 cm (5 in) it is the largest of the commonly kept Pangio species — noticeably bigger than its close cousin the Kuhli Loach — and that extra size makes it a more commanding presence in the lower reaches of a planted community aquarium.
Like all eel loaches, Pangio anguillaris is a bottom specialist. It probes the substrate with clusters of sensitive barbels around its mouth, foraging for small invertebrates and organic debris. By day the fish typically retreats beneath driftwood roots, inside hollow decorations, or under a blanket of leaf litter. As light dims in the morning and evening, groups become noticeably more active, weaving in loose formation across the sand — behaviour that makes the species genuinely rewarding to watch once it has settled in. Care is rated medium: water chemistry is non-negotiable, and the fish needs fine substrate and a social group, but feeding is undemanding and the animal is hardy once established in suitable conditions.
Where does the Striped Eel Loach come from?
Wild Pangio anguillaris inhabits slow-moving, heavily shaded freshwater habitats across the Malay Peninsula and Sarawak, Borneo — the two regions that make up its known range. In nature these fish occupy blackwater streams, forest drainage ditches, and still or gently flowing pools where the water is stained amber with tannins from decaying leaf litter and submerged wood.
Those habitats are characterised by soft, slightly acidic chemistry, fine sand or muddy bottoms, dense riparian vegetation, and low light filtered through the forest canopy. Replicating those conditions — or at least the water chemistry and substrate — is the single most important thing you can do for this species. Most specimens available in the hobby are wild-caught or first-generation tank-bred, so they carry a strong expectation of soft water.
What tank size and setup does the Striped Eel Loach need?
The practical minimum is 95 litres (25 gallons) — enough depth at the bottom for a small group to establish territories and enough footprint length for them to cruise. A longer, lower-profile tank is preferable to a tall one, since these fish are exclusively bottom-dwellers and make no use of open mid-water or surface space.
Substrate: Fine sand is essential, not optional. Coarse gravel damages the delicate barbels around the mouth. A layer of 3–5 cm (1–2 in) of soft sand lets the fish push their faces in while foraging and occasionally half-bury themselves.
Cover: Dense planting, tangles of driftwood or mangrove root, hollow ceramic tubes, Indian almond leaves, and smooth stones all provide the refuges these fish need during the day. A tank with nowhere to hide produces stressed, invisible fish. A tank with abundant cover produces fish that are comfortable emerging.
Flow and filtration: Keep current gentle. A sponge filter or an output directed along the back glass works well. High flow stresses these fish and is at odds with their slow-water origins. The tank must have a tight-fitting lid — eel loaches are accomplished escape artists and will find any gap.
What water parameters does the Striped Eel Loach need?
- Temperature: 24–28 °C (75–82 °F) — mid-tropical, standard for a Southeast Asian community tank.
- pH: 6.0–7.2. Soft to mildly acidic is the target; values above 7.5 cause chronic stress over time.
- Hardness: 2–10 dGH. This is genuinely soft water. If your tap water is very hard, consider mixing with reverse-osmosis or rain water to bring it into range.
Chemistry consistency matters as much as hitting the right numbers. Test monthly if your source water is stable; test more frequently during the first few months in a new tank. Do not overlook pH drift in densely planted tanks or tanks with lots of tannin-releasing wood — log it and correct gradually rather than chasing it with sharp adjustments.
What do Striped Eel Loaches eat?
Pangio anguillaris is an omnivore with a preference for small animal protein. In the aquarium, good staple options include:
- Sinking pellets or micro-wafers — choose a quality brand and ensure they sink promptly to the bottom before faster mid-water fish intercept them.
- Frozen or live bloodworms — enthusiastically taken and a useful conditioning food.
- Frozen daphnia and brine shrimp — useful variety and a mild laxative effect that supports digestive health.
- Tubifex worms — accepted keenly, but use sparingly due to disease-vector risk unless sourced from a reliable supplier.
Feed once a day, in the evening when the loaches are most active, to maximise the chance they get their share. In a community tank it pays to observe feeding closely for the first week to confirm the loaches are actually reaching food rather than being outcompeted by faster tank-mates. Dropper-delivered bloodworms placed near known hiding spots work well for targeted feeding.
How do Striped Eel Loaches behave, and what fish can live with them?
The Striped Eel Loach is fully peaceful and poses no threat to any fish it cannot physically swallow. Groups of four or more are livelier and more visible than pairs or singletons; a lone specimen will vanish into the decor and rarely emerge. Six individuals is a better target for a natural-looking display.
Compatible tank-mates are those that share the same soft, warm, slightly acidic water requirement and are not aggressive:
- Small schooling tetras (cardinal, rummy-nose, ember)
- Rasboras (Trigonostigma or Boraras species)
- Dwarf cichlids such as Apistogramma species (bottom-level overlap is manageable with ample cover)
- Small corydoras (water chemistry must overlap — avoid species that prefer harder water)
- Other Pangio species, including Kuhli Loaches, mix readily
Avoid boisterous, aggressive, or fin-nipping species. Large cichlids, puffer fish, and anything that actively hunts bottom-dwelling fish are incompatible. Because these loaches stay exclusively at the bottom, they rarely interact with surface or mid-water inhabitants at all.
For a full compatible species list, see Striped Eel Loach tank mates.
How do you tell male from female Striped Eel Loaches?
Sexual dimorphism in Pangio anguillaris is subtle and best assessed in mature, well-conditioned fish. Females become noticeably fuller-bodied and rounder in the belly region when gravid — viewed from above, the difference from a slender male is reasonably clear. Males have slightly broader pectoral fins, a trait used during the spawning embrace when the male wraps around the female to assist egg fertilisation.
Outside of breeding condition, sexing individual fish is difficult. For a group of six, you are likely to have both sexes represented without needing to identify individuals — which suits the social nature of the species anyway.
How do Striped Eel Loaches breed?
Breeding Pangio anguillaris in captivity is rated hard and rarely achieved in a standard community tank. Published reports describe a spawning embrace similar to other Pangio species, with eggs scattered among fine-leaved plants or substrate debris. Eggs and fry are extremely small and highly vulnerable to predation — including by the parents.
To attempt breeding, condition a dedicated group of four to six fish in a species-only tank with very soft, slightly acidic water, aged driftwood, and fine-leaved plants such as Java moss. Increase the proportion of live and frozen foods for several weeks. A small drop in water level followed by a gradual top-up with slightly cooler, very soft water sometimes triggers spawning behaviour, mimicking seasonal rainfall conditions. Rearing fry requires infusoria or commercial fry foods; even with effort, success is uncommon in home aquaria and the species is not commercially bred at scale.
What diseases affect Striped Eel Loaches, and how do you prevent them?
Eel loaches are scaleless or nearly scaleless, which makes them significantly more sensitive to salt and copper-based treatments than typical community fish. The most common health issues are:
- Ich (white spot): Small white granules across the body and fins. Almost always introduced via unquarantined fish or contaminated equipment. Prevention is straightforward: quarantine all new livestock for a minimum of four weeks before adding them to the display tank.
- Parasitic infestations (skin flukes, intestinal parasites): More likely in wild-caught fish. Dull colour, excess mucus, scratching against surfaces, and wasting despite eating are warning signs. Address through quarantine and, if needed, appropriate scaleless-safe treatments.
- Bacterial infections: Typically secondary to injury or poor water quality — fin damage, open sores. Maintain clean water and avoid sharp decor that can abrade the body.
- Stress-related decline: Incorrect chemistry (hard or alkaline water) causes slow, chronic deterioration that is easy to miss. Test water regularly.
Health note: Striped Eel Loaches are highly sensitive to medications containing copper, formalin, and salt. Always confirm a scaleless-safe alternative and halve the recommended dose as a starting point. For sick fish, verify symptoms against a veterinary or specialist fish-health reference before treating.
How long do Striped Eel Loaches live?
With appropriate care, Pangio anguillaris can live 5–10 years — a meaningfully long lifespan for a small community fish. The lower end of that range is typical for fish kept in suboptimal chemistry or without conspecifics; well-kept groups in soft, stable, warm water routinely reach the upper end.
The investment in getting the setup right — soft water, fine sand, dense cover, a group of at least four — pays off not just in longevity but in day-to-day visibility. A settled group in a well-designed tank is among the more characterful and entertaining bottom-dwellers available to the freshwater fishkeeper, emerging regularly in low light and weaving through roots and leaves in a way that is genuinely unlike any other community fish.
Frequently asked questions
What is the difference between a Striped Eel Loach and a Kuhli Loach?
Both are Pangio species with a similar worm-like shape, but the Striped Eel Loach (Pangio anguillaris) grows larger — up to 12 cm versus the Kuhli Loach's 8–10 cm — and has a cleaner, single bold lateral stripe rather than the banded or mottled pattern typical of Pangio kuhlii. They share the same care requirements and mix well in groups.
Do Striped Eel Loaches need to be kept in groups?
Yes — keep at least four, and six or more is better. Like all Pangio species they are highly social; single or paired individuals hide constantly and show stress. A group will be far more visible and active, especially during the dim hours of morning and evening.
What you need to keep a striped eel loach
The baseline is a heated, filtered 95 L+ tank: a reliable heater to hold 24–28 °C (75–82 °F), a gentle filter that won't batter a striped eel loach in the current, and a tight-fitting lid. Cycle the tank fully before adding any fish.
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