Home / Fishes / Carp, barbs, minnows, loaches / Botiidae / Tiger botia
No federal permit to keepTiger botia
Syncrossus helodes
Fishes › Carp, barbs, minnows, loaches (Cypriniformes) › Botiidae (Clown, yoyo and other loaches)
Syncrossus helodes, commonly known as banded loach, tiger botia or lesser katy loach, is a freshwater fish in the loach family Botiidae.
Care at a glance
Species-specific aquarium care
- Tank: At least 48 in long and 24 in front to back for one adult (adults commonly reach about 11.8 in / 30 cm).
- Water: Freshwater.
- Temperature: 75–86°F (range recorded for this species).
- pH: 6–6.5.
- Hardness: 0–5 dGH.
- Layout: Lives on or near the bottom: floor space and hiding places matter more than height.
- Diet: A predator: feed meaty foods sized to its mouth (frozen fish, shrimp, worms); it will eat tankmates that fit in its mouth. FishBase classes it as a carnivore.
Calculated from this species' own FishBase record: tank size from its typical adult length and swimming zone, water values from its recorded ranges. The group guide below fills in general care.
Care guide
Species care notes
- Tank: a base of at least 71 × 18 in (roughly 96 US gallons); space needed is rated “very large tank”.
- Water: a fairly wide range, from slightly acidic to slightly alkaline, 75–86 °F, pH 6–7.5, 2–12 dGH.
- Behaviour: a shoaling fish best kept in a group of six or more; not a community fish.
- Difficulty: Moderate (Seriously Fish rating).
Short excerpts from the species profile:
- Setup: “All botiids need a well-structured set-up although the actual choice of décor is more-or-less down to personal taste.”
- Tankmates: “Can be belligerent and should not be kept with much smaller fishes as they may be intimidated by its size and sometimes very active behaviour.”
- Breeding: “Appears not to have been bred in aquaria.”
From the Seriously Fish profile for this species, which has the full habitat, maintenance, diet, behaviour and breeding write-up 167
Clown, yoyo and other loaches
Applies to most species in this group. Habitat: Botiids inhabit Asian freshwater rivers and tributaries, including forested headwaters and seasonally flooded river margins. Individual species can differ, so compare with the species numbers above and the linked sources.
Housing & setup
- Provide at least an 80 × 30 cm (31 × 12 in) base for dwarf chain loaches; clown loaches require at least 180 × 60 cm (71 × 24 in).
- Use sand or fine gravel, smooth rocks, roots and numerous shelters; fill trapping holes and remove sharp edges.
- Fit a tight lid.
- Use a mature biological filter and maintain well-oxygenated water with some flow.
- Perform routine weekly water changes of 30–50% for the dwarf chain loach setup.
Climate & lighting
| Water | 75.2–86°F |
Diet
- Quality sinking dried foods
- Live or frozen bloodworms
- Daphnia or Artemia
- Blanched spinach or courgette
Social life
- For clown and dwarf chain loaches, keep at least 5–6 conspecifics, preferably 10 or more; pairs and trios can suffer severe dominance stress. Avoid slow, long-finned tankmates.
Handling
- Take care with the erectable subocular spines when moving loaches; they can become entangled in nets.
Health watch
- Stress and failure to feed in undersized social groups
- Entrapment injuries in narrow décor
- Water-quality illness from accumulated organic waste
Understanding the animal
About this animal
About this animal
It is native to rivers in Vietnam, Thailand, Laos and Cambodia. S. helodes resembles S. hymenophysa from Borneo, Sumatra and Peninsular Malaysia, and the two have frequently been confused.
Quoted from the Wikipedia article “Syncrossus helodes” (CC BY-SA 4.0) 174
In the wild
In the wild
From this species’ own FishBase record (habitat, bottom type, water and breeding data), not its family. Good care copies these conditions.1
| Where it lives | Lives in freshwater. Stays near the bottom. Usually found in large rivers with a muddy substrate. |
| Water it lives in | Freshwater, 75–86 °F (24–30 °C), pH 6–6.5, hardness 5 dH. |
| Climate | Tropical climate. |
| Wild diet | Hunting macrofauna (predator). |
What this means for care
- Keep water within its wild range, 75–86 °F.
Native climate (measured)
Native climate (measured)
| Warm-season highs | about 95°F (up to 98°F in the hottest sampled areas) |
| Cool-season lows | about 64°F (down to 57°F in the coldest sampled areas) |
| Average temperature | 78–82°F across sampled records |
| Relative humidity | 71–74% on average (driest month about 61%) |
| Rainfall | about 1456 mm a year, with strong wet and dry seasons |
Measured at 39 wild occurrence records sampled against WorldClim 2.1 climate data (1970–2000 averages). Air conditions in the range are ecological context, not enclosure settings: microhabitats such as burrows, leaf litter or basking rocks can be cooler, warmer or more humid.
From the sources
From the sources
Quoted from the matching sections of reputable sources for this exact species. Specialist databases are used first; Wikipedia (community-edited, CC BY-SA 4.0) only fills gaps. Other sources are short credited quotes.
| Overview | Syncrossus helodes, commonly known as banded loach, tiger botia or lesser katy loach, is a freshwater fish in the loach family Botiidae. It is native to rivers in Vietnam, Thailand, Laos and Cambodia. S. helodes resembles S. hymenophysa from Borneo, Sumatra and Peninsular Malaysia, and the two have frequently been confused. It differs from the latter species by the absence of a dark spot on the dorsal fin, 10–12 bars on body without blue borders (instead of 12–15 blue-bordered bars) and the presence of irregular dark markings on the lower body. — Wikipedia (community-edited) |
| Where it lives | Home ranges Population dynamics Growth parameters Max. ages / sizes Length-weight rel. Length-frequencies Mass conversion Recruitment Abundance Life cycle Reproduction Maturity Maturity/Gills rel. — FishBase |
| Reproduction | Mature females probably have a rounder abdomen compared to males. Breeding is not known to have occurred in aquaria. Presumably a seasonal, migratory spawner in nature. — Wikipedia (community-edited) |
| Appearance and size | It is the largest member of the tiger botia group, which like its close relatives, is aggressive and unsuitable for community aquariums. This species, like other Syncrossus, must be maintained in groups of five or more in order to spread any aggression and to allow the fish to form a natural hierarchy. This species has been known to grow up to 25–30 cm long. — Wikipedia (community-edited) |
| Biology | Usually found in large rivers with a muddy substrate and also with bottom cover of rocks, logs, or even brush piles. Nocturnal or crepuscular fish. Feeds on mollusks, benthic insect larvae and worms. — FishBase |
Data and studies
The numbers
The numbers
Each bar is what one source reports. Where several sources weigh in, the dashed gold band marks their average.
Adult length
Maximum recorded length. Measured as standard length (snout to the base of the tail, not counting the tail fin). Fish in home aquariums often stay smaller than wild records.
Water temperature
Range the species tolerates in nature; aim for the middle.
Water hardness
Minimum tank footprint
Seriously Fish recommends a tank base of at least 71 × 18 in (about 96 US gallons).
Sources for this sheet
- FishBase (Froese & Pauly, eds.), version 24.07 Peer-reviewed researchThe global scientific database on fishes, maintained by a consortium of research institutions; every value is referenced.
- Seriously Fish species profiles Experienced keeper or breederLong-running aquarium reference written and peer-checked by experienced fishkeepers and ichthyologists; each profile covers habitat, tank size, water, diet, behaviour and breeding.
- Seriously Fish: Chromobotia macracanthus Experienced keeper or breederAdded in the 2026 source-checked care-guide review.
- Seriously Fish: Ambastaia sidthimunki Experienced keeper or breederAdded in the 2026 source-checked care-guide review.
- Wikipedia (species article) Community referenceFree encyclopedia; useful overviews with their own citations. Intro text is quoted under CC BY-SA 4.0.
More clown, yoyo and other loaches
Bengal loach
Botia dario
Aquarium hobby
Black-lined loach
Ambastaia nigrolineata
Aquarium hobby
Blyth's loach
Syncrossus berdmorei
Aquarium hobby
Burmese border loach
Botia kubotai
Aquarium hobby
Chameleon loach
Syncrossus beauforti
Aquarium hobby
Clown loach
Chromobotia macracanthus
Aquarium hobby