How to Identify Orange-spotted Spinefoot

To identify Orange-spotted Spinefoot (Siganus guttatus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

The body is typically yellowish-brown to olive-green, covered with numerous small, bright orange or golden spots. A prominent large, dark blotch is often present below the posterior part of the soft dorsal fin, though its intensity can vary. The belly is paler. During spawning or stress, coloration can intensify or change.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Numerous small, bright orange or golden spots covering the body., A large, dark blotch below the posterior soft dorsal fin., Venomous spines in dorsal, anal, and pelvic fins., Small, rabbit-like mouth.

Dorsal fin

13 spines, 10 soft rays. The spines are venomous.

Tail fin

Slightly forked to emarginate.

Pectoral fin

16-18 rays.

Distinctive fins

Pelvic fins have 1 spine, 3 soft rays, and 1 spine (I,3,I), a characteristic feature of the Siganidae family. All fin spines are venomous.

Identification Tips

1. 1

   Body Spots

   Look for the distinctive bright orange or golden spots covering the entire body, which are a key identifier for this species.

2. 2

   Dark Blotch

   Observe the large, dark blotch located below the posterior part of the soft dorsal fin. This blotch can be more or less pronounced depending on the individual and its state.

3. 3

   Fin Spines

   Note the characteristic fin spine arrangement (13 dorsal, 7 anal, I,3,I pelvic) and be aware that all spines are venomous.

4. 4

   Mouth Shape

   The small, rabbit-like mouth is typical of rabbitfish, adapted for grazing on algae.

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