How to Identify Spined Loach

To identify Spined Loach (Cobitis), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Dorsal side is typically yellowish-brown to olive-brown, with a series of 10-20 dark, saddle-like blotches or spots along the lateral line. The ventral side is paler, often whitish or yellowish. Fins are usually translucent with faint spotting. Coloration can vary depending on substrate and geographic location, providing camouflage.

Scale type

cycloid

Mouth position

inferior

Distinctive features

Slender, eel-like body, laterally compressed., Six barbels around the mouth (two rostral, four maxillary)., A prominent, erectile, bifid spine located beneath each eye, which can be locked into an extended position., Small, embedded scales, giving the skin a smooth appearance., A dark spot at the base of the caudal fin.

Dorsal fin

Single, relatively short dorsal fin, typically with 7-8 branched rays, positioned slightly behind the midpoint of the body.

Tail fin

Caudal fin is slightly emarginate or truncate, with 12-14 branched rays.

Pectoral fin

Pectoral fins are small and rounded, with 7-8 rays.

Distinctive fins

Pelvic fins are small, abdominal, with 6 rays. Anal fin is short, with 5-6 branched rays.

Identification Tips

1. 1

   Body Shape and Size

   Elongated, slender body, typically reaching 8-12 cm (3-5 inches) in length, rarely up to 15 cm (6 inches).

2. 2

   Coloration and Pattern

   Yellowish-brown to olive-brown back with a distinct row of dark blotches along the lateral line. Paler belly. A dark spot at the base of the caudal fin is a key identifier.

3. 3

   Suborbital Spine

   The most definitive feature: a small, sharp, bifid (two-pointed) spine located just below each eye. This spine can be felt by gently running a finger along the cheek area (with caution).

4. 4

   Barbels

   Presence of six small barbels around the mouth, used for foraging in the substrate.

5. 5

   Scales

   Very small, embedded scales, making the skin feel smooth rather than rough.

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