How to Identify Map Pufferfish

To identify Map Pufferfish (Arothron mappa), look at these key features.

Physical Characteristics

Body shape

rounded

Coloration

The body is typically light brown, grey, or yellowish-white, covered with an intricate network of dark brown to black lines and spots that resemble a map or scribbles. A prominent black blotch is often present around the pectoral fin base, and another smaller one may be near the dorsal fin base. The belly is usually lighter, often white. The eyes are large and often have radiating dark lines.

Scale type

none

Mouth position

terminal

Distinctive features

Intricate 'map-like' or 'scribbled' dark line patterns on the body, Large, prominent eyes, Ability to inflate body when threatened, Absence of pelvic fins, Beak-like mouth with fused teeth, Often a large black blotch at the pectoral fin base

Dorsal fin

Single, small, and rounded, positioned far back on the body, typically with 10-12 soft rays.

Tail fin

Truncate to slightly rounded, relatively small compared to body size.

Pectoral fin

Small and rounded, located laterally behind the gill opening, typically with 16-19 soft rays.

Distinctive fins

No pelvic fins. Anal fin is similar in shape and size to the dorsal fin, positioned directly below it, typically with 10-12 soft rays.

Identification Tips

1. 1

   Body Pattern

   Look for the characteristic dark, intricate, and irregular lines resembling a map or scribbles covering the dorsal and lateral surfaces. This is the most defining feature.

2. 2

   Pectoral Fin Blotch

   A prominent, large black blotch at the base of the pectoral fin is a key identifier for Arothron mappa, distinguishing it from some other Arothron species.

3. 3

   Size

   This is one of the larger pufferfish species, reaching up to 65 cm (26 inches) in total length. Its substantial size helps differentiate it from smaller puffer species.

4. 4

   Eye Markings

   Observe the large eyes, which often have radiating dark lines, contributing to its distinctive facial appearance.

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