Author: (Günther, 1861)
Comments: Occurs inshore (Ref. 4343).  Although possibly entering estuaries, this species is more likely a benthic inhabitant (Ref. 57403, 79590) of marine intertidal zones (Ref. 27000, 57403, 79590).  Collected in shallow water among large lava-pebbles under strong wave action, and smaller examples came from a boundary area between rocks and sand at 2-4m depth (Ref. 39517). Maximum total length reported 8.7 cm (Ref. 57403).