Arrangement of several non-digestive organs in the visceral cavity is noteworthy. The swim bladder has bulges on each side which raise the centre of bouyancy above the centre of gravity so that the fish do not turn belly-up when sick or unconscious, as in salmonids. These bulges also come very near to the body surface and probably enhance hearing. The relatively high position of the swim bladder is displaced anteriorly and dorsally so that it partly overlays the stomach. The gall bladder is in the mesenteries just posterior to the liver