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Hillstream loach

Gastromyzon punctulatus

Hillstream loach© FishBase (CC BY-NC)

The Hillstream loach (Gastromyzon punctulatus) is a tiny, rheophilic freshwater catfish native to fast‑flowing mountain streams of Borneo. It clings to rocks using its flattened body and is prized by aquarists rather than anglers, making it a niche target for specialist anglers.

Fight
Taste
Inedible/Protected

Basic Information

Family

Gastromyzontidae

Max Size

6.5 cm

Habitat

freshwater

Climate

tropical

Best Season

Rainy season (May–October) when water flow is strongest

Best Time

Early morning or late afternoon when insects are most active

Distribution

No distribution map available

Fishing Tips for Hillstream loach

  • Use a very light ultralight rod (4‑5 ft) with a 2–4 lb test line
  • Present live macro‑invertebrates such as blackfly larvae or small mayfly nymphs on a size 8‑10 split‑shot hook
  • Fish in riffles and plunge pools, allowing the current to drift the bait naturally
  • Keep the line slack and use a gentle tap‑and‑pull motion to trigger the loach’s suction‑type bite

Market Prices

Recommended Fishing Equipment for Hillstream loach

Recommended Equipment

RodUltralight spinning rod, 4–5 ft, fast action
Line2–4 lb test monofilament or fluorocarbon
Lure TypeN/A
TechniqueRiffle drift or hand‑net targeting in fast currents

Best bait: Live blackfly larvae, mayfly nymphs, or tiny pieces of worm