The Firth of Thames, also known as Tīkapa Moana, is a large, shallow coastal inlet and significant estuarine system on the western side of the Hauraki Gulf in New Zealand's Waikato region. This expansive tidal water body is characterized by its extensive intertidal mudflats, which are of international ecological importance, and its reputation as a premier inshore fishing destination. The Firth is a highly tidal environment, with water levels and currents significantly influenced by the tide, requiring careful planning for boat launching and navigation. The seafloor is predominantly soft sediment, historically supporting rich biogenic habitats like mussel beds that have been impacted over time.