It looks like a vision of hell, on one of the most beautiful beaches in Australia, but not to worry, "it's just one of those natural occurences" :
"If there was environmental or probable health issues we'd certainly let people know."
An expected wind change is likely to wash the bloom back out to sea tomorrow and Sunday.
....the algae is a vital part of the ocean ecosystem.
"It's an important source of food," Dr Fortescue said.
The exact species of algae is not known, but it is not like fresh water algae, which can be toxic.
It stinks like hell as it rots, but the algae is expected to wash away in the next few days.
