This is rare event at Petrel Cove near Encounter Bay on the southern Fleurieu Peninsula:
A 2.7 metre wide bump-head sunfish (Mola alexandrini). It hasn't been attacked.
I initially thought that the waters of the Southern Ocean would have been too cold as they mostly live in temperate and tropical oceans and interpreted this an indication of increasing marine temperatures. However, I was informed that the waters along Australia's southern coast are temperate and these waters in the southern hemisphere are its habitat.
I returned a few days latter and it had gone. The tides had swept it back to the sea.
