How to Identify Barcoo Grunter

To identify Barcoo Grunter (Scortum barcoo), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Generally silvery-grey to brownish-green on the back, fading to a lighter, silvery belly. Often exhibits several indistinct dark bars or blotches on the flanks, which can vary in intensity. Fins are typically dusky.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Robust, moderately deep body, Small head with a slightly pointed snout, Large eyes, Prominent dorsal fin with a spiny anterior portion, Distinctive 'grunting' sound when handled

Dorsal fin

Single dorsal fin, deeply notched, with 11-13 strong spines followed by 9-11 soft rays.

Tail fin

Slightly forked to emarginate caudal fin.

Pectoral fin

Moderately sized, rounded pectoral fins.

Distinctive fins

Anal fin with 3 spines and 7-9 soft rays. Pelvic fins are thoracic, located directly below the pectoral fins.

Identification Tips

1. 1

   Body Shape and Coloration

   Look for a robust, compressed body, silvery-grey to brownish-green with indistinct dark bars on the flanks. The overall appearance is stocky.

2. 2

   Dorsal Fin

   Note the deeply notched dorsal fin with a prominent spiny anterior section, characteristic of grunters.

3. 3

   Sound Production

   If handled, listen for the characteristic 'grunting' sound, produced by rubbing pharyngeal teeth or vibrating the swim bladder.

4. 4

   Geographic Location

   Its presence in the Lake Eyre and Bulloo-Bancannia drainage basins is a key identifier, as its range is relatively restricted.

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