Sardines, known in Hong Kong as sa jin yu, are also called sardin, herring, and pilchard.The smaller ones are about two inches long while the larger ones are a foot or so, with lower jaws slightly longer than upper jaws, inconspicuous teeth, dark backs and white bellies, delicate flesh, often used to make canned food.Originally named after being caught in Sardinia, an Italian island.sardonios”" means "from Sardinia."From Sardinia..
