Aloha Jack,
If you are speaking of the small Cleaner Goby which has that neon blue horizontal stripe, they are gorgeous but typically don't last long in our tanks. This is probably because once they have cleaned all the parasites off their tankmates, they starve. There are exceptions of course.
The Firefish Goby is one of the reasons I decided to get into this hobby. They are beautiful. I love their coloration and fin action with the flicking of the dorsal spine. The Firefish is a midwater fish which can be a picky eater. In the wild, they eat live zooplankton. They are easy to scare and can easily jump out of the tank or simply pass away when frightened of their surroundings and tankmates.
What are the fish currently in your new tank and what other fish are you considering?
Mark