I came across this Jelly Blubber today while walking on Tallow Beach in the Cape Byron Conservation Area. There were several washed up on shore and the day before I saw one floating in the sea while we were swimming on Clarkes Beach.
They are found on the east coast of Australia. Further south from here, they have a white or brown color, but in the north, they are blue. They do give a painful sting, but are not dangerous to humans. Their preferred habitat is coastal lagoons along the coast where they are found in large swarms. The beaches of Cape Byron are famous for surf so the waves are pretty heavy.
if dried and prepared properly they are edible. I would like to try one.