If you have a Rainford...this is what I found
The Rainford's Goby, also referred to as the Court Jester Goby, or Old Glory, was first discovered in the Western Pacific in 1940 by Whitely. The body is green and blue with horizontal orange stripes running the entire length of the body.
It should be kept in a 30 gallon or larger aquarium that is well-established and has live rock and sand on which the fish can graze. It is best to keep only one of this species in an aquarium, unless the tank is large with an abundance of hiding places. It is rarely aggressive towards other species.
It is possible for the Rainford's Goby to spawn successfully in an aquarium.
The diet should consist of small crustaceans, such as live and frozen brine shrimp, mysid shrimp, as well as filamentous algae.