How to Identify Eurasian Gudgeon

To identify Eurasian Gudgeon (Gobio gobio), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Dorsal side is typically olive-brown to greenish-brown, fading to silvery-white on the belly. Flanks often display a series of 6-12 dark, rounded blotches or spots that form a lateral line pattern. Fins are usually translucent with faint dark spots or bands.

Scale type

cycloid

Mouth position

subterminal

Distinctive features

Two small barbels at the corners of the subterminal mouth, Large, prominent eyes positioned high on the head, Mottled coloration for camouflage, Relatively large, cycloid scales

Dorsal fin

Single dorsal fin with 2-3 unbranched and 6-8 branched rays, typically located midway along the back.

Tail fin

Forked caudal fin with 17-19 rays.

Pectoral fin

Paired pectoral fins are relatively large and rounded.

Distinctive fins

Pelvic fins are abdominal, positioned behind the pectoral fins. Anal fin is short with 2-3 unbranched and 5-7 branched rays.

Identification Tips

1. 1

   Barbels

   Presence of two distinct barbels at the corners of the mouth is a key identifier, distinguishing it from many other small cyprinids.

2. 2

   Body Shape and Coloration

   Elongated, cylindrical body with a mottled brown/olive back and silvery belly, often with a row of dark blotches along the lateral line.

3. 3

   Mouth Position

   Subterminal mouth, adapted for bottom feeding, is characteristic.

4. 4

   Fin Structure

   Single dorsal fin and forked caudal fin are typical.

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