If I had a picture, I might be able to tell more but you did the right thing in moving him to the fuge. Leave him there and keep an eye on him. You also learned a valuable lesson about triggerfish. You can not put them in a tank with other than aggressive fish. Now that the trigger is in your tank, it has become his tank. You risk him attacking any other fish that you introduce. Triggers are generally a good last fish to add to an aggressive tank. I wouldn't really recommend them for other than a FOWLR.
Good luck with your goby. you will probably want to find a nice new home for him if he survives. Hopefully he will.