The prevalence and nature of electronic forms of bullying (cyberbullying) was investigated among 1,530 primary and secondary school aged male students (Years 6 to 12; 9-18 years, chronologically) in Sydney and Brisbane, Australia. Findings revealed that victimization via the Internet was the most common form of cyberbullying with 11.5 percent of students reporting at least one experience of it during the school year. A significant main effect was found, with junior secondary school students (Years 8 to 10) the most likely to be victimized in this manner. With regard to the cyberbullying of others, the Internet was again the most commonly employed method, with 8.5 percent of students reporting using it. A main effect was evident between year levels for all four forms of cyberbullying investigated. The transmission of electronic images was the least reported form of cyberbullying experienced (4.8 percent) and the least frequently perpetrated form of cyberbullying (3.7 percent), which is less than the only other study conducted reporting such data. These findings are discussed in the light of the relatively limited cyberbullying research undertaken to date. (Contains 4 tables.)