Everything fishy I ever ate, except for wee brown trout I guddled from a burn (over 35 years ago) and fried in butter within five minutes of being out of the water. I caught them to prove I could, and I only ate a tiny wee bite of them, the rest were devoured by my camping friends.
I was still at the teenage stage of trying not to be as sensitive as an Aunt and Great Aunt to too many things.
( really makes me wonder sometimes, just what biological advantage this allergic thing offers we do live long though, most of the family reach their mid nineties, and two have been over 100) The worst I expected was just to throw up and come out in hives, but I was fine. Tried salmon a fortnight later and was violently ill
Clegs are horse flies with a bite like a red hot poker
M