How to Identify Blue-spotted Puffer

To identify Blue-spotted Puffer (Arothron caeruleopunctatus), look at these key features.

Physical Characteristics

Body shape

rounded

Coloration

The body is typically light brown, grey, or yellowish-tan, densely covered with numerous small, iridescent blue spots. The ventral surface is usually lighter, often white or pale yellow. Some individuals may exhibit darker blotches or saddles on their dorsal surface. The fins are generally translucent or slightly yellowish.

Scale type

none

Mouth position

terminal

Distinctive features

Numerous small, iridescent blue spots covering the entire body, including fins., Robust, inflatable body lacking scales., Small, prickly spines embedded in the skin, erect when inflated., Strong, beak-like teeth formed by fused dental plates.

Dorsal fin

Single, small, and rounded, positioned far back on the body.

Tail fin

Truncate to slightly rounded caudal fin.

Pectoral fin

Small and rounded, positioned laterally.

Distinctive fins

Absence of pelvic fins. Dorsal and anal fins are set far back, opposite each other, providing propulsion.

Identification Tips

1. 1

   Body Coloration and Spots

   Look for a light-colored body (tan, grey, or yellowish) densely covered with distinct, small, iridescent blue spots. This is the most defining characteristic.

2. 2

   Body Shape

   Observe the robust, rounded body shape typical of Arothron puffers. Note the absence of scales and the presence of small, recumbent spines.

3. 3

   Mouth and Teeth

   Identify the small, terminal mouth with fused dental plates forming a beak-like structure, characteristic of pufferfish.

4. 4

   Fin Placement

   Note the small dorsal and anal fins positioned far back on the body, opposite each other, and the absence of pelvic fins.

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