The Cloudy Bay Lagoon Marine Conservation Area is located within Cloudy Bay Lagoon in the south of Bruny Island.
The reserve occupies 480.1 hectares and incorporates the Cloudy Bay Lagoon inlet system which contains seagrass and shallow sediment microalgae, a highly productive environment. The inlet is of high conservation value and is considered to be the most pristine marine inlet in the Bruny Bioregion.
The area was proclaimed a conservation area under the Nature Conservation Act 2002 on 9 December 2009. This reserve class provides for the protection and maintenance of the natural and cultural values of the area and the sustainable use of natural resources.
Fishing is permitted in the reserve. Rules and regulations relating to recreational fishing in Tasmania can be found in the Recreational Sea Fishing Guide.