Fish with dairy (Sephardic law or Minhag)

I’ve been asked, what is the deal where many Sephardim will not eat fish with dairy. Here is the story: The source of the discussion is the Beit Yosef in Yoreh Deah 87, where the printed text says: “ומ״מ אין לאכול דגים בחלב מפני הסכנה” But virtually all the evidence...