The other two are the ocean sunfish (Mola mola), which is the most abundant of the three species, and the bump-head sunfish (Mola alexandrini). All three species can grow to about 11 feet (3.3 ...
The SA Museum said while there were various types of sunfish, the one in question was "almost certainly a bump-head sunfish, Mola alexandrini", also sometimes known as the giant sunfish.