Scorpionfishes are slow-moving or sedentary carnivores, and many have venomous spines. Some are camouflaged masters, while others have distinct colors and enlarged fins that heighten visibility. Most scorpionfishes are hard to detect, because they rely on dull and mottled coloration so they won't be noticed. Only when threatened do they show their bright colors and display their venomous spines. The spines are like an injection of poison once it enters the victim. It is possible to mistake them for rocks while exploring the reefs. There are 25 species of Scorpionfish in Hawai'i. In ancient Hawai'i, it was believed that the eggs of some nohu hatched into sharks.
The Devil Scorpionfish has a hump on its back and pectoral fins that are bright yellow and orange underneath. It will flash its bright colors after moving several feet when agitated. The Devil Scorpionfish is thoroughly camouflaged, and its body color depends on its surroundings. Even its skin may have algae or other growths! The species name means "devil", and the Hawaiian names means "streaked." They grow up to 12 inches.