Branches are operated by shell collectors and amateurs interested in the marine environment. Branches usually hold monthly meetings for discussions and display of shells. Some branches organise shell collecting field trips.

The Australian National Shell Show has been organised by shell clubs every two years, rotating between Brisbane, Sydney, Melbourne and Adelaide.

Shell collectors associated with the Society are expected to abide by the Code of Ethics for Shell Collectors.

Malacological Society of Australasia, Victorian Branch