How to Identify Shi Drum

To identify Shi Drum (Umbrina cirrosa), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Silvery-grey to brownish-grey on the back, fading to silvery-white on the belly. Sides often exhibit faint, oblique, wavy dark lines or bands. Fins are typically dusky.

Scale type

ctenoid

Mouth position

subterminal

Distinctive features

A single, short, thick barbel on the chin, which is a key diagnostic feature., A prominent, slightly humped back., Large, cycloid scales., A relatively small mouth, subterminal in position.

Dorsal fin

Two dorsal fins; the first is spiny with 9-10 spines, and the second is long with 1 spine and 24-28 soft rays. The two fins are separated by a distinct notch.

Tail fin

Truncate to slightly emarginate caudal fin.

Pectoral fin

Moderately long pectoral fins.

Distinctive fins

Anal fin with 2 spines and 7-8 soft rays. Pelvic fins thoracic.

Identification Tips

1. 1

   Chin Barbel

   The presence of a single, short, and thick barbel on the chin is the most reliable distinguishing feature for Umbrina cirrosa among other sciaenids.

2. 2

   Dorsal Fins

   Two distinct dorsal fins, with the first spiny and the second long and soft-rayed, separated by a clear notch.

3. 3

   Body Coloration and Markings

   Silvery-grey body with faint, oblique, wavy dark lines on the sides, which can be more pronounced in some individuals.

4. 4

   Mouth Position

   A relatively small, subterminal mouth, adapted for bottom feeding.

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