How to Identify Australian Pompano

To identify Australian Pompano (Trachinotus australis), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Silvery-grey dorsally, fading to white or pale silver on the flanks and belly. Juveniles may exhibit faint vertical bars or yellowish tints. Fins are typically dusky or yellowish, with the caudal fin often having a darker posterior margin.

Scale type

cycloid

Mouth position

subterminal

Distinctive features

Deeply compressed, oval-shaped body, Small, slightly inferior mouth, Forked caudal fin with pointed lobes, Absence of scutes along the lateral line (distinguishing feature from many other Carangids), Relatively small, embedded scales

Dorsal fin

Two dorsal fins; the first with 6-7 short, stout spines, the second with 1 spine and 18-20 soft rays. The anterior rays of the second dorsal fin are elongated, giving it a sickle-like appearance.

Tail fin

Deeply forked, with long, pointed lobes.

Pectoral fin

Long and falcate (sickle-shaped), extending beyond the origin of the anal fin.

Distinctive fins

Anal fin similar in shape to the second dorsal fin, with 2 detached spines followed by 1 spine and 16-18 soft rays. Pelvic fins are relatively small.

Identification Tips

1. 1

   Body Shape

   Look for a very deep, laterally compressed, oval-shaped body, which is characteristic of pompanos.

2. 2

   Mouth

   Note the small, slightly inferior mouth, which is adapted for bottom feeding.

3. 3

   Lateral Line

   Crucially, observe the lateral line for the absence of scutes (bony plates), which differentiates it from many other Carangid species.

4. 4

   Fins

   The long, falcate pectoral fins and the deeply forked caudal fin with pointed lobes are key identifiers. The anterior rays of the second dorsal and anal fins are often elongated.

5. 5

   Coloration

   The overall silvery-grey body, often with a darker dorsal surface and lighter belly, is typical. Juveniles might show faint banding.

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