How to Identify Murray River Cod

To identify Murray River Cod (Maccullochella peelii), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Highly variable, typically dark green to olive-green or brown on the back and sides, fading to a creamy white on the belly. Covered in distinctive dark green, brown, or black mottling and spots, which provide excellent camouflage in their riverine habitats. The pattern can be quite intricate and unique to individuals.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Large, broad head with a prominent, slightly concave profile above the eyes., Very large mouth extending back beyond the eye, with numerous small, sharp teeth., Robust, deep body, particularly in larger specimens., Rounded caudal fin., Absence of scales on the head., Pelvic fins located anterior to the pectoral fins (jugular position).

Dorsal fin

Two dorsal fins, closely joined: the first with 8-10 strong spines, the second with 10-12 soft rays. The spiny dorsal fin is relatively low.

Tail fin

Large, rounded caudal fin.

Pectoral fin

Large, rounded pectoral fins, positioned low on the body.

Distinctive fins

Anal fin with 3 spines and 10-12 soft rays. Pelvic fins are jugular (anterior to pectorals) with 1 spine and 5 soft rays.

Identification Tips

1. 1

   Size and Body Shape

   Australia's largest freshwater fish, reaching over 1 meter and 100 kg. Has a robust, deep body and a large head.

2. 2

   Coloration and Pattern

   Mottled green, brown, or black patterns over a lighter background, providing excellent camouflage. The pattern is irregular and blotchy, not striped.

3. 3

   Mouth

   Very large, cavernous mouth extending well past the eye, indicative of its predatory nature.

4. 4

   Fin Position

   Pelvic fins are located forward of the pectoral fins (jugular position).

5. 5

   Head Scales

   Head is scaleless, a key distinguishing feature from some other large freshwater fish.

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