How to Identify Australian Bass

To identify Australian Bass (Macquaria novemaculeata), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Generally dark olive-green to bronze on the back, fading to silvery-white on the belly. Some individuals may exhibit a darker, almost black, dorsal surface. Fins are typically dusky.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Deep, laterally compressed body., Large mouth extending to below the eye., Prominent, spiny dorsal fin., Slightly concave head profile., Often displays a series of faint, irregular dark blotches or bars along the flanks, particularly in younger fish.

Dorsal fin

Two dorsal fins, broadly joined at the base. The first dorsal fin is spiny (7-10 strong spines), and the second is soft-rayed (9-12 soft rays).

Tail fin

Moderately forked caudal fin.

Pectoral fin

Pectoral fins are relatively small and rounded.

Distinctive fins

Anal fin has 3 strong spines and 7-9 soft rays. Pelvic fins are thoracic.

Identification Tips

1. 1

   Body Shape

   Look for a deep, compressed body with a relatively large head and mouth.

2. 2

   Dorsal Fin

   Note the prominent, spiny first dorsal fin, broadly joined to the soft-rayed second dorsal fin.

3. 3

   Coloration

   Observe the typical dark olive-green to bronze back and silvery belly. Faint blotches may be present.

4. 4

   Lateral Line

   The lateral line is complete and gently curved.

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