An aerial view of the estuary of the Taw and Torridge Rivers, near Bideford and Barnstaple, Devon, England, United Kingdom, Europe

Rice fields and fish ponds on the Gulf of Boni estuarine coast near South Sulawesi's second city, Palopo, Luwu, South Sulawesi, Indonesia, Southeast Asia, Asia

An aerial view of the estuary of the Taw and Torridge Rivers, near Bideford and Barnstaple, Devon, England, United Kingdom, Europe

An aerial view of the estuary of the Taw and Torridge Rivers, near Bideford and Barnstaple, Devon, England, United Kingdom, Europe

Rice fields and fish ponds on the Gulf of Boni estuarine coast near South Sulawesi's second city, Palopo, Luwu, South Sulawesi, Indonesia, Southeast Asia, Asia

Saltmarsh, estuarine harbour at high tide and moored sailing yachts, Alvor, near Portimao, Algarve, Portugal, Europe

Mangrove swamp on Fiji, Pacific