The South East Australian Basketball League (SEABL) is a semi-professional basketball league in Australia, comprising both a men's and women's competition. Formerly part of the Australian Basketball Association (ABA), the SEABL is considered the strongest second-tiered basketball league in the country, developing many emerging Australian Boomers and Opals players, as well as fostering a highly competitive second-tier competition under the National Basketball League (NBL) and Women's National Basketball League (WNBL). The league boasts teams from every state or territory other than Western Australia and the Northern Territory.