Kaikorai Lagoon is a coastal estuary and lagoon system located on Dunedin's south coast, forming the eastern boundary of Ocean View Beach. This saltwater environment is characterized by its mudflats, saltmarsh, and reed swamp habitats, and is recognized as a Regionally Significant Wetland and an Area of Significant Conservation Value. The lagoon is intermittently closed from the Pacific Ocean by a sand berm, with breaching events significantly influencing its salinity and ecology. It provides a shallow littoral habitat that supports a variety of estuarine and marine fish species, making it a unique inshore fishing destination within easy reach of the city.