Pregnant Sushi Advice needed

I just found out I am pregnant, and my sister is coming to town this weekend. We ALWAYS go eat sushi together. She doesn't know I am pregnant yet. So, I want to tell her over lunch. I have read there are certain restaurants that make a 'pregnancy roll' with ingredients 'ok' for moms to be. Has anyone found these? It would be just the trick to order one.. and see the look on her face! =)

PS: Also.. what else can pregnant women eat at sushi restaurants? Im kinda clueless to this.