How to Identify Leopard Puffer

To identify Leopard Puffer (Sphoeroides spengleri), look at these key features.

Physical Characteristics

Body shape

rounded

Coloration

Dorsal surface is typically mottled brown, tan, or olive with irregular dark spots and blotches, resembling a leopard's pattern. A distinctive dark band runs along the lower flank, often broken into a series of spots or dashes. The ventral surface is white to pale yellow. A prominent dark bar or spot is usually present at the base of the pectoral fin. The caudal fin often has a dark submarginal band.

Scale type

none

Mouth position

terminal

Distinctive features

Leopard-like spotting on the dorsal surface., Dark, often broken, lateral band along the lower flank., Small, spiny prickles on the dorsal and ventral surfaces, particularly when inflated., Absence of pelvic fins., Beak-like mouth formed by fused teeth.

Dorsal fin

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

Tail fin

Rounded to slightly truncate, often with a dark submarginal band.

Pectoral fin

Small and rounded, located high on the body, typically with 14-16 rays. A prominent dark bar or spot is usually present at its base.

Distinctive fins

No pelvic fins. Anal fin is small and similar in shape and position to the dorsal fin, with 9-11 soft rays.

Identification Tips

1. 1

   Coloration and Pattern

   Look for the characteristic leopard-like spots and blotches on the back and the dark, often broken, band along the lower side. The dark spot at the pectoral fin base is also a key identifier.

2. 2

   Body Shape

   Typical pufferfish body shape, capable of inflation. When not inflated, it is somewhat elongated and robust.

3. 3

   Fin Arrangement

   Note the absence of pelvic fins and the small, posteriorly placed dorsal and anal fins.

4. 4

   Size

   Generally a smaller pufferfish species, rarely exceeding 18 cm (7 inches) in total length.

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