How to Identify Chinese Hillstream Loach

To identify Chinese Hillstream Loach (Beaufortia kweichowensis), look at these key features.

Physical Characteristics

Body shape

flat

Coloration

The dorsal surface is typically mottled with irregular dark brown to black markings on a lighter tan or yellowish-brown background, providing excellent camouflage against rocky substrates. The ventral surface is pale, often whitish. The fins are usually translucent with dark bands or spots.

Scale type

none

Mouth position

inferior

Distinctive features

Extremely flattened ventral surface, forming a large adhesive disc with the paired fins., Large, horizontally oriented pectoral and pelvic fins that are fused to the body and form a suction cup., Small, subterminal mouth with several pairs of barbels., Eyes located dorsally on the head.

Dorsal fin

Two dorsal fins, the first being short and high, the second longer and lower.

Tail fin

Caudal fin is emarginate to slightly forked.

Pectoral fin

Greatly expanded and horizontally oriented, forming part of the adhesive disc.

Distinctive fins

Pelvic fins are also greatly expanded and horizontally oriented, forming the posterior part of the adhesive disc, often appearing fused with the pectoral fins to create a continuous suction surface.

Identification Tips

1. 1

   Body Shape

   Look for the extremely flattened, ray-like body, especially the ventral surface, which is adapted for clinging to surfaces.

2. 2

   Fin Structure

   Observe the large, horizontally spread pectoral and pelvic fins that form a continuous adhesive disc, distinct from other loach species.

3. 3

   Coloration

   Note the mottled brown and tan pattern on the dorsal side, which provides camouflage against rocky riverbeds.

4. 4

   Mouth Position

   The small, inferior mouth with barbels is characteristic of bottom-dwelling, grazing species.

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