The Port Bonython oil spill occurred on 30 August 1992, when the fuel tank of the tanker Era was pierced by the bow of the tugboat Turmoil during berthing operations in upper Spencer Gulf, South Australia.[1] Wind and swell were high and 296 tonnes of bunker fuel were released into Spencer Gulf. The incident resulted in 500 oiled birds and damage to 15 km of mangrove and seagrass habitat south-west of Port Pirie.