Inhabits shallow waters, often including tide pools of exposed seaward reefs , usually in high-tide splash zones and at shallow depths .
Dorsal spines (total): 7; Dorsal soft rays (total): 8 - 9; Anal spines: 1; Anal soft rays: 7 - 8. This species is distinguished by the following characters: complete cephalic sensory-canal pore system (pattern 1); the fifth pelvic-fin ray 10-40% (usually 20%) of fourth ray; some pectoral-fin rays are branched; dorsal/anal-fin formula 9/8; presence of a prominent occipital spot; dorsal midline of body with a series of small dark spots along the dorsal-fin bases; dark bars present crossing the nape in advance of dorsal fin; caudal-peduncle depth 13.4-14.9% SL .: fusiform / normal.
Behavioural data for Emerald dwarfgoby is currently being reviewed.
Marine; reef-associated; depth range 0 - 40 m . Tropical; 30°N - 30°S south to Australia and Norfolk Is.
The following diseases are known to affect Emerald dwarfgoby.
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