How to Identify Haddock

To identify Haddock (Melanogrammus aeglefinus), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Dorsal side is typically dark grey to brownish-grey, fading to silvery-white on the flanks and belly. The most distinctive feature is the prominent black lateral line and a large, sooty-black blotch (often described as a 'thumbprint' or 'devil's mark') above the pectoral fin.

Scale type

cycloid

Mouth position

subterminal

Distinctive features

Prominent black lateral line, Large, dark 'thumbprint' blotch above the pectoral fin, Small barbel on the chin, Three dorsal fins, Two anal fins

Dorsal fin

Three distinct dorsal fins. The first dorsal fin is triangular and tall, the second and third are progressively lower and longer.

Tail fin

Slightly forked caudal fin.

Pectoral fin

Relatively long and pointed pectoral fins.

Distinctive fins

Two anal fins, similar in shape to the second and third dorsal fins.

Identification Tips

1. 1

   Lateral Line

   Always black and clearly visible, contrasting with the lighter body color.

2. 2

   Shoulder Spot

   A distinct, dark, often oval-shaped blotch located just above the pectoral fin. This is the most reliable distinguishing feature.

3. 3

   Chin Barbel

   A small, but present, barbel on the chin, which is characteristic of many gadids.

4. 4

   Dorsal Fins

   Three separate dorsal fins, with the first being noticeably taller and more pointed than the subsequent two.

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