#$%^&*AU2015200888A120150319.pdf#####ABSTRACT A fish cage for use in water comprising a main part (1) made of a watertight, substantially rigid material and having an outlet for effluent (12), wherein the main part is substantially hemispherical. The cage may further include a floating collar (2) from which the main part is suspended, and at least one nozzle (10) adapted to provide a flow tangential to a circumference of the main part (1).3/5 Fig 3a 101 Fig 3b Fig 3c
