Stonefish Identification Guide

Key identification features

• Squat, heavy-bodied fish covered in warty, lumpy, mottled gray-brown to olive skin that mimics rock or coral rubble
• Eyes set high on top of the head, with an upturned mouth for ambushing prey from below
• Thick, fleshy dorsal fin with 12-13 stout, venomous spines running along the back
• Broad, fleshy pectoral fins used to prop the body against the substrate
• Grows to about 30-40 cm (12-16 in); virtually motionless, relying entirely on camouflage

Common look-alikes

• Scorpionfish: generally has a more pronounced head crest and longer fin rays, and often flashes bright colors on the underside of the pectoral fins, which stonefish lack
• Frogfish: rounder body with a distinctive lure on top of the head, and lacks the stonefish's rows of dorsal spines
• Toadfish: smoother-skinned and lacks the raised, wart-like bumps covering a stonefish's body

Where you'll see one

Stonefish lie motionless, partly buried in sand, mud, or rubble on shallow reef flats, lagoons, and tidal pools throughout the tropical Indo-Pacific, relying on stillness rather than movement to avoid detection.