Ama ebi nutritional info?

Hey all - I'm headed to sushi with my husband tonight and trying to pre-plan a bit. One of the dishes I typically order is ama ebi - basically the shrimp tail is served raw over rice (nigiri style) - which I can calculate no problem. The problem is in the tempura shrimp head that comes with it (and really is the reason I order it at all). Anyone know what the info on this would be (or a reliable way of calculating/estimating it)? I've Googled, but to no avail... TIA! :flowerforyou: