How to Identify Atlantic Herring

To identify Atlantic Herring (Clupea), look at these key features.

Physical Characteristics

Body shape

torpedo

Coloration

Dorsal side is typically dark blue to greenish-blue, fading to silvery flanks and a white belly. This countershading provides camouflage in the open ocean.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Absence of a lateral line on the body (present only on the head), A single, relatively short dorsal fin located mid-body, Ventral fins located directly below the dorsal fin, Deeply forked caudal fin, Smooth, cycloid scales that are easily shed, A series of keeled scales (scutes) along the belly, though less pronounced than in some other clupeids.

Dorsal fin

Single, short, located approximately mid-body, with 16-21 soft rays.

Tail fin

Deeply forked, symmetrical, providing powerful propulsion for sustained swimming.

Pectoral fin

Relatively small, positioned low on the body, with 16-19 soft rays.

Distinctive fins

Pelvic fins are abdominal, positioned directly below the dorsal fin. No adipose fin.

Identification Tips

1. 1

   Body Shape and Coloration

   Look for the streamlined, silvery body with a dark blue-green back. The body is laterally compressed but not excessively deep.

2. 2

   Fin Placement

   Note the single dorsal fin positioned centrally, and the pelvic fins directly beneath it. The caudal fin is deeply forked.

3. 3

   Scales

   Herring have relatively large, smooth, cycloid scales that are easily detached. The belly has a slight keel of scutes, but it's not as sharp or prominent as in species like shad or menhaden.

4. 4

   Absence of Lateral Line

   Unlike many fish, the lateral line is not visible along the body, only on the head.

5. 5

   Size

   Adult Atlantic Herring typically range from 20-40 cm (8-16 inches) in length, with some individuals reaching up to 45 cm (18 inches).

Explore Atlantic Herring