Any of about nearly 400 species of bony fishes in the family Scorpaenidae. Scorpionfishes have large, heavily ridged and spined heads.They possess venomous spines on their dorsal fins, each with a groove and venom sac. Scorpionfishes are well camouflaged to blend in with their environment with fleshy projections and background coloration. Some can change their color to better match their surroundings. The most venemous fish in the world, the reef stonefish (Synanceia verrucosa), is disguised to look like a encrusted rock or lump of coral. This species is widely distributed throughout tropical, marine waters of the Indo-Pacific. Most species of scorpionfishes are demersal, living on or near the bottom. They are carnivorous ambush predators feeding on crustaceans, cephalopods and fishes.