Roughy, RUHF ee, is the name of a group of fish that live in temperate oceans throughout the world. Roughies range from 3 to 20 inches (8 to 51 centimeters) long. The orange roughy is the most common and one of the largest species. It is important commercially, especially around New Zealand. It is sold fresh or frozen. A freshly caught adult orange roughy is actually red. It turns orangish after several hours out of the water.