Do not feed GF to a SW fish! They contain thiamise & will cause serious problems down the road. Try damselfish.
thank you i willl not give him goldfish thanks! damselfishes are quite expensive to use as feeders and id rather keep them if i have them

http://www.**************.com/forum/library/feeding/feeders/
You should try to get him onto dead foods.
http://www.**************.com/forum/library/feeding/problems-feeding-your-puffer/
yes i will try giving him dead fish and pieces of shrimp, is it ok to give him mollies? if so i will breed them.
Why is there no substrate? How was the tank cycled? What are you using for filtration? Also, your fish need to be raised to marine.