I'm not going to say what the proper diet of the Rainford goby is, but I have one in my tank and it is quite happy running around eating any of the "bugs" it encouters on the glass, rocks, coral ect. He is also an active participant during feedings of flake, brine and mysis shrimp. In short, I think he'll eat just about anything that will fit down his throat. That may be just my fish, I'd hate to speak for an entire species.
