Figure-Eight Puffer Identification Guide

Key identification features

• Small, rounded, boxy body typical of puffers, capable of inflating when threatened
• Olive-green to yellowish-green back marked with one or more black, looping figure-eight or ring-shaped patterns
• Bright white to pale yellow belly with a sharp contrast against the darker back
• No visible pelvic fins, and a small beak-like mouth formed from fused teeth plates
• Smooth or finely prickly skin rather than true scales
• Stays small, usually under 8 cm

Common look-alikes

• Dwarf puffer: much smaller and more uniformly mottled or spotted, lacking the distinct figure-eight loop pattern on the back
• Green spotted puffer: covered in scattered round black spots over a green back rather than a connected looping design
• Other small brackish puffers: separated primarily by the specific shape and continuity of the dark back markings

Where you'll see one

Figure-eight puffers inhabit brackish creeks, mangrove-lined estuaries, and slow rivers across Southeast Asia, particularly around Indonesia and Malaysia. They are usually seen resting near submerged roots, leaf litter, or dense vegetation, hovering in place with small pectoral fin movements and darting for cover when disturbed.