An interesting contrast among corals is that of a Great Barracuda and a Juvenile Rock Beauty. Barracudas have a beastly expression and a very sleek body. The silver color helps provide a stealth aspect as it blends well above the corals. In contrast the juvenile yellow and black Rock Beauty is very visible but rarely seen as a target of aggression by a Barracuda. Rock Beauty will grow to 12 inches yet a Great Barracuda will may grow to be 6 feet!