Just got a Turret Cowfish and its not eating...

[Coldwater]

I just recently got a Turret Cowfish ,Tetrosomus gibbosus, whatever you want to call it. It will get food in its mouth then spit out half. So far I have tried mysis shrimp, bloodworms, krill, various flakes and silver sides. What would you recomend or is it just that its in a new tank? Either way it has got to be the coolest fish ever.

Matt