There are some underwater sites of particular beauty and these are designated as marine reserves. There are seven marine and coastal reserves around the island of Tongatapu. The coral reef gardens between Nuapapu and Vakateitu. These marine reserves are for viewing only. No collection of any kind of organism is allowed, including fish shells or other marine life.
Many sea shells are important for the balance of life on the coral reefs.
Take dead shells or buy shells whenever possible. Never break the coral to find shells. Tokanoas, once common throughout the Pacific are now on the IUCN endangered species list. The first Tongan Giant Clam Circle was placed on Mounu Reef in Nuku'alofa Harbour in June of 1986. It represents the first time in modern history that a brood stock of clams has been placed in a shallow water, protected for the purpose of increasing local food stocks of these important animals.