Wonky hole is a colloquial, Australian term for a submarine groundwater discharge, a freshwater spring flowing from the seabed.
Wonky holes are found in the Great Barrier Reef and the Gulf of Carpentaria, both in Queensland.
[1][2][3] Wonky holes are located along riverbeds which existed in the last glacial period ending about 11,000 years ago.
Coral does not grow well in the fresh water, resulting in irregular growth around wonky holes.
Water flowing along the submarine riverbeds and exiting at wonky holes can be charged with nutrients carried from the mainland.