Adults occur in rocky creeks . Also found in small, steep-gradient creeks, usually within 20 km of the sea .
Dorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 1; Anal soft rays: 9. Longitudinal scales 33-34; transverse scales 11-12; predorsal scales 2-6. Maxillary extends beyond midline of eye, upper jaw prominent; lips fleshy. Gill opening small, only from upper to lower margin of pectoral fin base. Head naked above behind eye. Scales on predorsal and behind pectoral cycloid; on other part of body ctenoid. Spines of 1st dorsal about equal .: fusiform / normal.
Behavioural data for Sicyopus Zosterophorus is currently being reviewed.
Marine; freshwater; brackish; benthopelagic; amphidromous ; depth range 0 - 5 m . Tropical; 10°N - 17°S
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