How to Identify Tench

To identify Tench (Tinca tinca), look at these key features.

Physical Characteristics

Body shape

rounded

Coloration

Typically dark olive-green to golden-brown on the back, fading to a lighter, yellowish-green on the flanks and a creamy white or yellowish belly. Fins are usually dark.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Small, deeply embedded scales giving a smooth, slimy appearance (due to thick mucus layer)., Small, red-orange eyes., A single, small barbel at each corner of the mouth., Thick, leathery skin.

Dorsal fin

Short, high, and rounded, with 3-4 unbranched and 8-9 branched rays.

Tail fin

Slightly emarginate (forked) or almost truncate, with rounded lobes.

Pectoral fin

Relatively small and rounded.

Distinctive fins

All fins are rounded and lack spines, though the first ray of the dorsal and anal fins is often thickened and bony.

Identification Tips

1. 1

   Body Shape and Coloration

   Look for the robust, deep-bodied, olive-green to golden-brown fish with a lighter belly. The body is covered in a thick layer of mucus, making it feel slimy.

2. 2

   Scales

   The scales are very small and deeply embedded, giving the fish a smooth appearance, unlike the larger, more prominent scales of common carp.

3. 3

   Eyes and Barbels

   Distinctive small, red-orange eyes and a single, tiny barbel at each corner of the mouth are key identifiers.

4. 4

   Fins

   All fins are rounded, and the caudal fin is only slightly emarginate or almost truncate, not deeply forked like many other cyprinids.

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