How to Identify Samson Fish

To identify Samson Fish (Seriola hippos), look at these key features.

Physical Characteristics

Body shape

torpedo

Coloration

Dorsal surface is typically dark blue to greenish-blue, fading to silvery-white on the flanks and belly. A faint, often indistinct, amber or yellowish stripe may run horizontally along the lateral line, particularly in younger individuals. Fins are generally dusky, with the caudal fin often having a yellowish tinge.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Robust, elongated, and slightly compressed body., Large, deeply forked caudal fin., Two dorsal fins, the first short and spiny, the second much longer and soft-rayed., A small, fleshy keel on each side of the caudal peduncle., Absence of scutes along the lateral line, distinguishing it from some other carangids.

Dorsal fin

First dorsal fin with 7-8 spines; second dorsal fin with 1 spine and 27-33 soft rays. The anterior rays of the second dorsal fin are notably elevated.

Tail fin

Deeply forked and powerful, indicative of a fast-swimming pelagic species.

Pectoral fin

Relatively short, falcate (sickle-shaped), and positioned low on the body.

Distinctive fins

Anal fin similar in shape and size to the second dorsal fin, preceded by 2 detached spines (which may be embedded in adults) and followed by 1 spine and 18-22 soft rays.

Identification Tips

1. 1

   Body Shape

   Look for a robust, torpedo-shaped body that is slightly compressed laterally.

2. 2

   Coloration

   Dark blue to greenish-blue dorsally, silvery-white ventrally. A faint amber stripe may be present along the lateral line, especially in juveniles.

3. 3

   Dorsal Fins

   Two distinct dorsal fins; the first short and spiny, the second long with a prominent anterior lobe.

4. 4

   Caudal Fin

   Deeply forked, powerful tail, often with a yellowish hue.

5. 5

   Lateral Line

   The lateral line has no scutes, which helps distinguish it from some other jack species.

6. 6

   Anal Fin

   Similar in appearance to the second dorsal fin, preceded by two small, often embedded, spines.

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