How to Identify Spotted Scat

To identify Spotted Scat (Scatophagus argus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

The body is typically silvery-green to brownish-green, adorned with numerous dark, irregularly shaped spots that vary in size and intensity. Juveniles often have more pronounced spots and may exhibit vertical banding, which fades with age. The fins are often dusky or yellowish.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Deep, highly compressed body, almost disc-shaped., Small, terminal mouth., Prominent, venomous spines in the dorsal, anal, and pelvic fins., Scales are small and ctenoid, covering the entire body and parts of the head.

Dorsal fin

Single dorsal fin with 11-12 strong, venomous spines followed by 16-18 soft rays. The spiny and soft-rayed portions are deeply notched.

Tail fin

Caudal fin is slightly emarginate to truncate.

Pectoral fin

Pectoral fins are relatively small and rounded.

Distinctive fins

Pelvic fins have 1 spine and 5 soft rays, also venomous. Anal fin has 4 strong, venomous spines followed by 13-15 soft rays.

Identification Tips

1. 1

   Body Shape and Coloration

   Look for the deep, compressed, disc-like body with numerous dark spots on a silvery-green to brownish-green background. The spots are the most defining characteristic.

2. 2

   Fin Spines

   Note the prominent, strong spines in the dorsal, anal, and pelvic fins. These are venomous and should be handled with extreme caution.

3. 3

   Habitat

   If observed in the wild, their presence in brackish or estuarine environments is a strong indicator.

4. 4

   Juvenile vs. Adult

   Juveniles often have more distinct spots and may show faint vertical bands, which become less apparent as they mature.

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