Are you guys really discussing the kashrus like that's the issue here?
"Herring fillets are from Canada" - packed in Germany, for a NY company - seems fishy
"To heat, remove from can and microwave, or immerse unopened can in boiling water and simmer" YUCK
I'd get kicked out of my kiddush club for bringing these cans or any can - glass jar is even B'di Eved