I didn't realize that either. DH started with fish, first trout and salmon then it moved to other fish. Finally about 4 years ago on my birthday we had shrimp for dinner (he could still eat shell fish) well he had a bad reaction and we spent the whole evening in the ER. Now, I don't even cook fish in the house unless he is out of town. The funny thing is, he can eat Caesar Salad and dressing even if it has the sardine stuff in it. We do keep Eppie Pens here and also take them with us whenever we travel.
He always says that if he is ever on death row he will have Fried Crappie and King Crab Legs for his last meal!