Dr.’s Mandrola, Prasad and Cifu—I enjoy reading your sensible medicine and appreciate this opportunity to present a question. Approximately 25 years ago I had a gastrointestinal reaction to the fish-Sea Bass. It presented with terrible vomiting and diarrhea about 3 hours after eating, lasting 4 hours then I felt fine. I thought it was bad fish but when i again ate Sea Bass the very same thing happened. Also , over the years I had a similar reaction , although not as dramatic, to anything with anchovy paste specifically caesar and green goddess dressing. Fast forward to 2023 I began taking Krill Oil because the statin I was taking was causing my blood sugar to rise. I am a 77 year old , healthy , active, 125 pound female so I blamed the slight rise in blood sugar on the statin. After about 4 months of taking the Krill Oil I developed Atrial fibrillation, I stopped taking it immediately. I only had 3 episodes of A.fibrillation and have not had another one in over a year. I’m curious about the sensitivities to these different fishes and if they might have caused the Afib. I have read studies that Omega 3’s might be causing afib. Thank you so much for considering an answer.