Should I just buy at the fish counter? I? pici local and rinse, then d? put in the tank open, so he can get? meat? Or, should I remove the shell, and chop the meat? What other goodies to feed and how do I go? the subject of food, is that I can not put this much to live for him unless it can be brought into the water sal? e as it is a fully marine fish. Any other suggestion? give her a big happy little puffer? 
You can buy him fresh seafood from the store and prepare the meal yourself. Just don’t drop the entire thing in and leave it, it will rot. Take it out if he doesn’t eat it within an hour or so. Sometimes it is best to crack it in half or pieces. He will benefit from a little shell left on the meat. You can also try to find live mussels and let him pick them off.
You can also buy the frozen preparations. My puffers love:
http://www.sfbb.com/product_popup.asp?category=frozen-shrimp&prod=Mussel&id=5
and other quality SFB foods.
The saltwater multipacks by SFB have a variety of foods your puffer will love as well:
http://www.fosterandsmithaquatics.com/product/prod_display.cfm?c=3578+7927+8038+8131&pcatid=8131
Ask your local store to order you some or order online if interested.