Author: (Trewavas, 1935)
Comments: Favors a sediment-free rocky habitat, where it stays in midwater about one meter away from the substrate.  Is normally found just below the surface, rarely deeper than 5 m.  Mostly seen at places where the rocky coast drops steeply.  Feeds on invertebrates taken from the water and on insects that fall into the water (Ref. 5595).