Inhabits mangrove swamps and inlet waters ; shallow coastal waters with mud, sand, or rock bottoms . Forms aggregations near surface .
Dorsal spines (total): 7; Dorsal soft rays (total): 14 - 16; Anal spines: 1; Anal soft rays: 14 - 16. Body yellowish brown with a black longitudinal stripe and a bright blue spot between dorsal spines 5 and 6. SL to 25 mm . : elongated.
Behavioural data for Rao's hover goby is currently being reviewed.
Marine; brackish; reef-associated. Tropical; 30°N - 20°S West Pacific: Arabian Gulf and the Gulf of Oman (Ref.
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