Curonian Spit The Curonian Spit divides the Curonian Lagoon from the sea. Parts of the lagoon are within the inscribed area.; link
Danube Delta Includes, inter alia, the Razelm-Sinoie lagoon Complex which "comprises several large backinsh lagoons separated from the sea by a sandbar" (AB eval)
Shark Bay Shark Bay's "attractions are also supplemented by secondary features such as Shell Beach, Big Lagoon and the Zuytdorp Cliffs which combine to add even further interest to the area"
Sian Ka'an
Many coastal lagoons e.g search for lagoon in this UN document ; link
Socotra Archipelago Several - Nom file mentions inter alia Qalansiya, Suq and Diduah Lagoons and the former is an important bird watching location; link
Tubbataha Reefs "Classic atoll reef with an altitude of 2m to 100m deep with associated lagoon of 24m deep."