How to Identify Northern Sennet

To identify Northern Sennet (Sphyraena borealis), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Silvery-gray to greenish-gray dorsally, fading to white or silvery on the flanks and belly. Often has faint, dusky bars or blotches on the sides, which can be more pronounced in juveniles or when stressed. Fins are typically dusky or yellowish.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Elongated, cylindrical body, Pointed head with a large mouth, Prominent, sharp, canine-like teeth of varying sizes, Two widely separated dorsal fins, Protruding lower jaw

Dorsal fin

Two dorsal fins; the first with 5 spines, the second with 1 spine and 9 soft rays. The first dorsal fin originates posterior to the pectoral fin base.

Tail fin

Forked caudal fin.

Pectoral fin

Short, located low on the body.

Distinctive fins

Pelvic fins are abdominal, located beneath the first dorsal fin.

Identification Tips

1. 1

   Body Shape

   Very slender and elongated, almost pencil-like, compared to larger barracuda species.

2. 2

   Head and Mouth

   Pointed head with a large mouth and a distinctly protruding lower jaw. Teeth are prominent and sharp.

3. 3

   Dorsal Fins

   Two widely separated dorsal fins. The first dorsal fin is positioned well behind the pectoral fins.

4. 4

   Lateral Line

   A distinct lateral line runs along the length of the body.

5. 5

   Size

   Generally smaller than other barracuda species, rarely exceeding 60 cm (24 inches) in length.

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