Fugu Identification Guide

Key identification features

• Rounded, inflatable body that lacks pelvic fins entirely
• Small mouth with a beak-like tooth plate fused into two upper and two lower sections, giving a parrot-like bite
• Skin that is smooth or covered in tiny, fine prickles rather than long spines
• Mottled or spotted dark pattern over a pale belly, with the exact pattern varying by species
• Small, rounded dorsal, anal, and pectoral fins set close to the body
• Modest adult size for most species, generally well under 50 cm

Common look-alikes

Other pufferfish genera, such as Arothron and Lagocephalus, differ mainly in skin texture and tail shape, some being fully smooth and others more angular in outline. Porcupinefish carry long, erectile spines across the whole body, which fugu species never develop, making spine length the fastest way to separate the two groups at a glance.

Where you'll see one

Fugu species inhabit coastal and estuarine waters of the northwest Pacific, especially around Japan and Korea, typically hovering over sandy or muddy bottoms in shallow to moderate depths.