Nocturnal Beetle is a term used to describe a type of beetle that is active at night. The most common type of nocturnal beetle is the SCARAB, which is a six-letter word. Scarabs are a type of beetle found in many parts of the world and are known for their large size and distinctive shape. They are also known for their hard shells, which protect them from predators. Scarabs are often seen as symbols of protection and good luck in many cultures.