Horizontal stripe Yunnan loach
Yunnanilus spanisbripes
Yunnanilus spaniobipes exhibits distinctive horizontal stripes and a slender body, typically displaying a blend of brown and yellow hues.
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About the Horizontal stripe Yunnan loach
A small Yunnan stone loach from the Niulanjiang River system in China, you almost never see this one in the trade. Females have a neat horizontal stripe while males tend to be blotched or spotted, which makes groups look extra interesting. If you keep it, treat it like other Yunnanilus stream loaches with clean, well-oxygenated water, sand, and gentle current.
Also known as
Quick Facts
Size
7.5 cm
Temperament
Peaceful
Difficulty
Advanced
Min Tank Size
21 gallons
Lifespan
3-5 years
Origin
China - Yunnan (upper Yangtze basin)
Diet
Omnivore - small sinking pellets, frozen/live micro foods, occasional algae-based foods
Water Parameters
22-26°C
6-7.5
2-12 dGH
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This species needs 22-26°C in a 21 gallon tank. Use our heater calculator to find the right wattage.
Calculate heater sizeCare Notes
- Give them a 20-long or bigger with strong flow (8-10x turnover), high oxygen, and a tight lid; use soft sand with rounded stones and leaf litter so they can dig without shredding barbels.
- Keep it cool and clean: 64-72 F (18-22 C), pH 6.2-7.4, GH 2-8, nitrate under 15 ppm, and zero ammonia or nitrite with lots of surface agitation.
- They settle best in groups of 6+; pack the tank with hides and broken sightlines so the pushy ones cannot park on the shy ones.
- Tankmates should be gentle and quick-water types that do not dominate the bottom, like white clouds, small danios, or ricefish; skip large barbs, cichlids, or fin-nippers.
- They are micro-predators, so offer small sinking foods: baby brine, daphnia, chopped bloodworm, grindal or blackworms, and 0.5-1 mm pellets; feed 2-3 small meals and try one after lights out until they catch on.
- Quarantine new fish and deworm if needed (levamisole or flubendazole); use half-doses for most meds and avoid copper or formalin with loaches.
- Heat is their kryptonite; once water creeps past 75 F they stress and gasp, so run a fan or chiller in summer and keep good evaporation top-offs.
- Breeding is rare but try cool-season cues: big cool water changes, brisk flow, and a layer of marbles or fine gravel for eggs to fall into, then pull adults after a night of chasing.
Compatibility
Good Tankmates
- Small, chill schooling fish like chili rasboras, ember or green neon tetras - they hang midwater and will not spook the loaches
- Microrasboras and ricefish - gentle, active, but not food bullies
- Pygmy and habrosus corydoras - peaceful bottom buddies if you have sand and some elbow room
- Kuhli loaches and other mellow, non-territorial loaches - similar vibe and activity level
- Sparkling gourami or other tiny, calm labyrinth fish - low-drama surface and midwater company
- Amano shrimp and nerite or mystery snails - adults are fine, but shrimp babies will get picked off
Avoid
- Anything nippy or boisterous like tiger barbs, serpae tetras, or fast danios - they stress shy Yunnan loaches and outcompete them at feeding
- Cichlids and angelfish - too big or territorial, and small loaches look like snacks
- Pufferfish, even pea puffers - chronic nippers that hassle small loaches
- Crayfish and big clawed shrimp (Macrobrachium) - they grab resting loaches at night
Where they come from
Horizontal stripe Yunnan loaches are little stream fish from Yunnan, China. Think clear, cool-to-mild creeks with sandy bottoms, smooth stones, and leaf litter tucked along the margins. Flow is steady but not blasting like a hillstream setup. That bold lateral stripe helps them blend along roots and shadows as they forage for tiny critters.
Setting up their tank
They look tiny, but they use floor space. A 20-long is the minimum I’d use for a group, and they really settle in once the tank is mature and a bit “alive” with biofilm. Keep them in a group of 8-12 so the shyness spreads out and they show natural behavior.
- Tank size: 20-30 gallons long for a proper group
- Temperature: 20-24 C (68-75 F); they appreciate a cool spell down to ~18-20 C seasonally
- pH: 6.2-7.4; GH 2-10 dGH; KH low to moderate; TDS roughly 60-200
- Flow: moderate, high oxygen; add an airstone if in doubt
- Substrate: soft, fine sand so they can sift and rest without scraped bellies
- Decor: smooth pebbles, leaf litter, tangled roots/wood, and plants on wood/rock (Anubias, Bolbitis, Java fern)
- Cover: tight lid; they will find any gap
Use a canister or HOB with a sponge pre-filter so no loach ends up in the intake. I like a small powerhead aimed along the front glass to give a gentle lane of current, with calmer pockets behind wood and stones. Let some algae film and biofilm build on hardscape; they browse it constantly.
Seed the tank with seasoned media and move in some scuffed-up hardscape from an established setup. These loaches do better in tanks that already have micro-life for them to pick at.
Skip sharp gravel. Bright, unshaded lighting stresses them and invites skittish dashes. Keep temps under 26 C (79 F); warm, low-oxygen water knocks them flat.
What to feed them
They are micro-predators and sand-sifters. Mine really woke up with live and frozen foods first, then learned to take prepared stuff. Feed small, frequent meals at first while they figure out where food lands.
- Live/frozen: baby brine shrimp, daphnia, cyclops, grindal/white worms (in moderation), chopped blackworms
- Prepared: high-quality micro pellets and wafers that actually sink
- Gels and pastes: Repashy-style blends spread on a flat stone
- Supplement: decaying leaf litter fosters microfauna they constantly pick at
Target-feed with a pipette/turkey baster into their hangout zones. A smooth “feeding tile” (flat stone) makes cleanup easy and stops food from vanishing into the sand.
Two small feedings a day beats one big dump. Watch their bellies: gently rounded after a meal is good; pencil-thin means step up the food or switch to more enticing live options for a bit.
How they behave and who they get along with
They’re social but shy, and they gain confidence in numbers. Expect lots of gentle chasing and side-by-side showing off among males. Most action happens at dawn and dusk; during bright hours they rest under leaves or wood and make short foraging runs.
- Great tankmates: small, calm fish that ignore the bottom (ricefish, small rasboras, pencilfish), tiny surface killies, gentle dwarf shrimp in well-planted setups
- Use caution: curious nano cichlids or anything that hogs the bottom may stress them
- Avoid: big, boisterous danios/barbs, nippy fish, or anything large enough to gulp them
Most are wild-caught. Quarantine new arrivals. I routinely deworm with levamisole or flubendazole during quarantine and keep the air cranked up while medicating.
Breeding tips
Not common in home tanks, but it can happen if you set the stage. They scatter tiny eggs in fine cover and don’t provide care. The trick is conditioning and giving the eggs a place to hide.
- Group setup: run a group with both sexes; feed heavy on live/frozen foods for 2-3 weeks
- Spawning cues: a couple of larger cool water changes and slightly dimmer light
- Spawning sites: dense moss, yarn mops, and a tray of very fine sand or glass marbles
- Post-spawn: either move the adults or move the media to a rearing box with gentle air
- Raising fry: start with infusoria/green water, then microworms and freshly hatched BBS once they can take it; keep flow minimal but oxygen high
Fry are tiny and sensitive. Keep bacteria and fungus in check by avoiding overfeeding and doing small, frequent water changes with matched, well-oxygenated water.
Common problems to watch for
- Wasting/skinny disease: sunken bellies despite feeding. Often internal worms; treat during quarantine.
- Ich after shipping or temp swings: bump aeration and use a gentle med protocol.
- Low oxygen sensitivity: hanging near the surface or rapid gilling means you need more air and cooler water.
- Injuries from rough substrate: switch to fine sand and keep decor smooth.
- Getting stuck in intakes or jumping: sponge pre-filters and tight lids are non-negotiable.
- Starvation in busy communities: they lose food to faster midwater fish; target-feed.
Keep the tank clean but not sterile: low nitrate, steady parameters, and lots of dissolved oxygen. I do 25-30% weekly water changes, vacuum lightly over the sand surface, and leave some biofilm on hardscape. With these loaches, the small details add up fast.
Pre-purchase checklist: active but not frantic, clear eyes and skin, no frayed fins, bellies not pinched, steady breathing. If the store fish look listless at the surface, walk away.
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