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Borneo Sucker Loach
Gastromyzon punctulatus
Animalia›Chordata›Actinopterygii›Cypriniformes›Balitoridae
📍 Borneo, Malaysia & Indonesia
Spotted disc-shaped hillstream loach that suctions onto rocks and glass. Needs well-oxygenated, high-flow water.
Care Guide
Diet
Borneo Sucker Loaches are primarily herbivorous and feed on biofilm, algae, and aufwuchs naturally found on rocks and driftwood. Supplement with high-quality algae wafers, blanched vegetables (zucchini, spinach), and occasional small frozen foods like bloodworms. Feed small amounts daily, as they graze continuously throughout the day.
Behavior
These peaceful, bottom-dwelling loaches are nocturnal and spend most of their time suctioned to rocks, driftwood, and glass surfaces using their specialized disc-like mouths. They are generally solitary or found in small groups in the wild, and while not aggressive, they can be territorial with other loaches. They require strong water flow and high oxygen levels to thrive, making them active swimmers in well-oxygenated tanks.
Breeding
Breeding Borneo Sucker Loaches in captivity is extremely difficult and rarely documented in the aquarium hobby. They require very specific environmental conditions including high flow, precise temperature, and likely seasonal triggers that are difficult to replicate. Most specimens in the trade are wild-caught, and successful captive breeding remains largely undocumented.
Tank Mates
Similar size, peaceful herbivores with comparable water flow requirements
Small, peaceful mid-water swimmers that won't compete for bottom space
Peaceful algae eaters that share similar water quality and flow preferences
Similar habitat needs but can be territorial; requires careful observation
Closely related with identical water flow and biofilm-feeding requirements
Common Diseases
Ich (Ichthyophthirius multifiliis)
White spots on body and fins, rapid breathing, flashing against surfaces
Increase temperature gradually to 28°C, use ich medication, maintain excellent water quality and aeration
Bacterial Fin Rot
Frayed or deteriorating fins, discoloration at fin edges, lethargy
Perform frequent water changes, improve water quality, use antibacterial medication if severe
Gill Parasites
Rapid gill movement, gasping at surface despite high oxygen, loss of appetite
Use antiparasitic medication, increase aeration and water flow, quarantine affected fish
Poor Water Quality Stress
Loss of coloration, reduced feeding, clamped fins, lethargy
Perform large water changes, check filtration and flow rates, test water parameters (pH, ammonia, nitrite)
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Quick Facts
- pH
- 6.5–7.5
- diet
- herbivore/biofilm
- maxSize
- 2 inches
- minTankSize
- 20 gallons
- temperature
- 68–77°F (20–25°C)
Temperature
68–77°F
20–25°C