How to Identify Weakfish

To identify Weakfish (Cynoscion regalis), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Iridescent silvery-green to bronze on the back, fading to silvery-white on the sides and belly. The back and upper sides are often marked with small, irregular dark spots or wavy lines. The fins are typically yellowish, especially the caudal and pectoral fins.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Two prominent canine-like teeth in the upper jaw, near the tip., A relatively large mouth extending to or beyond the posterior margin of the eye., A lateral line that is slightly arched anteriorly and then straight to the caudal fin., A soft, easily torn mouth, giving it the 'weakfish' name.

Dorsal fin

Two dorsal fins; the first is spiny with 9-11 spines, and the second is soft-rayed with 1 spine and 25-29 soft rays. The two fins are distinctly separated.

Tail fin

Caudal fin is emarginate (slightly forked) to truncate.

Pectoral fin

Pectoral fins are relatively long, reaching past the origin of the first dorsal fin.

Distinctive fins

Anal fin has 2 spines and 11-12 soft rays. Pelvic fins are thoracic.

Identification Tips

1. 1

   Teeth

   Look for two prominent canine-like teeth in the upper jaw, a key distinguishing feature from other similar species.

2. 2

   Coloration and Markings

   Observe the iridescent silvery-green to bronze back with small, irregular dark spots or wavy lines. Yellowish fins are also characteristic.

3. 3

   Mouth

   Note the large mouth that extends to or beyond the posterior margin of the eye.

4. 4

   Dorsal Fins

   Identify the two distinctly separated dorsal fins: a spiny anterior fin and a soft-rayed posterior fin.

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