jellyfish often occurs in swarms, either in the Bay or washed
up on the beaches. Here and in southern Queensland they are commonly
blue. They may be brown or white in other areas. The brown colour
is caused by symbiotic algae. They are often accompanied by small
fish. The sting is not generally considered to be serious.
species can be distinguished by its conspicuous internal cross.
They have very fleshy, three-winged arms around their mouths.
A full complement is eight, but they are often seen fewer arms
or with pieces missing. There is no obvious mouth on the underside,
but there are small openings on each arm, through which food is
passed to the stomach.