It looks like a galaxy traveling over the ocean, but it is the blue button antomedusa, a colony of individuals of the species Porpita porpita. In summer, hundreds of them are blown by the winds to the beaches of the eastern coast of Australia. These marine organisms are very fragile and, when touched, they break into fragments.
The appearance of these cnidarians is branched and filiform, reminiscent of a vegetable. Some specimens are installed on shallow rocky edges and take advantage of the movement of the waves to move