How to Identify Spotted Puffer

To identify Spotted Puffer (Tetraodon fluviatilis), look at these key features.

Physical Characteristics

Body shape

rounded

Coloration

The dorsal surface is typically olive-green to brownish-green, fading to a lighter, often white or yellowish ventral side. The body is adorned with numerous irregular black or dark brown spots, which can vary in size and intensity. Some individuals may exhibit a reticulated pattern or darker blotches.

Scale type

none

Mouth position

terminal

Distinctive features

Robust, rounded body capable of inflation, Large, prominent eyes, Beak-like mouth with fused teeth, Absence of pelvic fins, Small, rounded dorsal and anal fins set far back on the body

Dorsal fin

Single, small, and rounded, positioned posteriorly, opposite the anal fin.

Tail fin

Truncate to slightly rounded, used for propulsion.

Pectoral fin

Fan-like, used for maneuvering and hovering.

Distinctive fins

Pelvic fins are absent. The dorsal and anal fins are small and positioned symmetrically near the caudal peduncle.

Identification Tips

1. 1

   Body Shape and Coloration

   Look for the characteristic rounded, robust body with an olive-green to brownish-green back and a lighter belly, covered in distinct black or dark brown spots. The ability to inflate is a key identifier.

2. 2

   Mouth Structure

   Observe the unique beak-like mouth formed by fused teeth, which is typical of pufferfish and used for crushing shells.

3. 3

   Fin Arrangement

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

4. 4

   Eye Placement

   Their large, independently moving eyes are prominent and allow for excellent vision, aiding in hunting.

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