How to Identify Macquarie Perch

To identify Macquarie Perch (Macquaria australasica), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Generally dark grey to brownish-black on the back, fading to a lighter grey or silvery-white on the belly. Often exhibits a mottled or blotchy pattern, particularly when young, which provides camouflage. Fins are typically dusky.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Deep, laterally compressed body, Relatively small, slightly upturned mouth, Large, prominent eyes, Strongly ctenoid scales, Single, continuous dorsal fin with a distinct notch between spiny and soft-rayed portions, Rounded caudal fin

Dorsal fin

Single, continuous dorsal fin with 10-12 strong spines followed by 10-13 soft rays, deeply notched.

Tail fin

Caudal fin is rounded.

Pectoral fin

Pectoral fins are relatively small and rounded.

Distinctive fins

Pelvic fins are thoracic, located below or slightly in front of the pectoral fins, with one spine and five soft rays. Anal fin has 3 spines and 8-10 soft rays.

Identification Tips

1. 1

   Body Shape

   Look for a deep, laterally compressed body, giving it a 'slab-sided' appearance.

2. 2

   Mouth Size and Position

   The mouth is relatively small and slightly upturned, not large and gape-like as in some other native predators.

3. 3

   Dorsal Fin

   Observe the single, continuous dorsal fin with a noticeable notch separating the spiny anterior portion from the soft-rayed posterior portion.

4. 4

   Coloration

   Note the dark grey to brownish-black back, lighter belly, and often mottled pattern. Color can vary with habitat.

5. 5

   Eyes

   Macquarie Perch have relatively large, prominent eyes.

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