How to Identify Stone Loach

To identify Stone Loach (Barbatula barbatula), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Dorsally, it is typically yellowish-brown to olive-brown, mottled with darker brown or black blotches and spots that provide excellent camouflage against stony substrates. The ventral side is paler, often whitish or yellowish. Fins are usually translucent with faint banding.

Scale type

cycloid

Mouth position

subterminal

Distinctive features

Six barbels around the mouth (two rostral, four maxillary), Small, embedded scales, giving a smooth appearance, A small, subterminal mouth, A single, short dorsal fin positioned towards the rear of the body, A slightly forked or truncate caudal fin

Dorsal fin

Single, short, positioned posterior to the midpoint of the body, typically with 7-9 branched rays.

Tail fin

Slightly emarginate to truncate, with 14-17 branched rays.

Pectoral fin

Relatively large and rounded, positioned low on the body, with 10-12 rays.

Distinctive fins

Pelvic fins are abdominal, positioned behind the pectoral fins, with 6-7 rays. Anal fin is short, with 5-7 branched rays.

Identification Tips

1. 1

   Barbels

   Count the six barbels around the mouth; this is a key distinguishing feature from other small benthic fish.

2. 2

   Body Shape and Coloration

   Observe the elongated, cylindrical body and the mottled brown/olive coloration with darker blotches, which helps it blend with the substrate.

3. 3

   Scales

   Feel the skin; it will feel smooth due to the very small, embedded cycloid scales, unlike many other fish with more prominent scales.

4. 4

   Fin Position

   Note the single, short dorsal fin positioned relatively far back on the body.

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