Also know as Black Shrimpgoby, Barred Prawngoby, Barred Watchman Goby, Bluefin Watchman Goby, Gudgeon, Prawn Goby, Shrimp Goby, Y-bar Shrimpgoby.
Found in pairs or colonies, sharing their burrow with an alpheid shrimp, over sandy areas of reef patches, in clear water coastal and inner reef slopes. Varies in colour, sometimes different two colours sharing a burrow.
They feed on benthic invertebrates.
Length - 14cm
Depth - 2-20m
Widespread Indo-West Pacific
Shrimp Gobies live a symbiotic relationship with snapping shrimps.
The Gobies stand guard while the shrimps play "housekeeper" to their burrow, continually digging and cleaning the sand. The Gobies will signal when predators are near. (edit) Ref: https://www.fishbase.se/summary/12679