How to Identify Australian Salmon

To identify Australian Salmon (Arripis trutta), look at these key features.

Physical Characteristics

Body shape

torpedo

Coloration

Dorsal surface is typically dark blue-green to grey-green, fading to silvery-white on the flanks and belly. Often has several rows of small, dark spots along the upper flanks, particularly noticeable in younger individuals. Pectoral fins are yellowish.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Streamlined, fusiform body adapted for fast swimming., Large, deeply forked caudal fin., Two dorsal fins, the first spiny and the second soft-rayed., Small, dark spots on the upper flanks (more prominent in juveniles)., Yellowish pectoral fins.

Dorsal fin

Two dorsal fins: the first with 9-10 strong spines, the second with 1 spine and 15-17 soft rays. The two fins are separated by a distinct gap.

Tail fin

Large, deeply forked caudal fin, indicative of a fast-swimming pelagic species.

Pectoral fin

Relatively small, yellowish pectoral fins positioned low on the body.

Distinctive fins

Anal fin with 3 spines and 9-10 soft rays. Pelvic fins are thoracic, located beneath the pectoral fins.

Identification Tips

1. 1

   Body Shape and Coloration

   Look for the streamlined, torpedo-shaped body with a dark blue-green to grey-green back and silvery sides. Small, dark spots on the upper flanks are a key identifier, especially in smaller fish.

2. 2

   Fin Structure

   Note the two distinct dorsal fins (spiny anterior, soft-rayed posterior) and the deeply forked tail. Yellowish pectoral fins are also a good indicator.

3. 3

   Size

   Adults typically range from 40-80 cm in length and 1-5 kg in weight, though larger specimens up to 90 cm and 9 kg have been recorded.

4. 4

   Schooling Behavior

   Often seen in large, active schools near the surface, particularly when feeding on baitfish, which can cause surface disturbances.

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