The Marine protected area (MPA) network is a subset of existing protected sites that have marine features. Sites include: SACs, SPAs, Ramsars, SSSIs and MCZs.What features are considered marine is determined through expert groups of SNCBs led by JNCC. The list of MPA network features are hosted by JNCC https://hub.jncc.gov.uk/assets/8ee15786-510b-44e4-819e-e6681a1abd96