Smoked smelt from Grandpa and Grandma is a distant memory. I picked some up in Vancouver WA from an E European deli several moons ago. Didn't try prats.
I lost my love for bone in a couple years back when I opened a cheap cheap cheap Grocery Outlet can that'd been bouncing around in the truck for several seasons. Putrid mush....
I don't do mackerel either.
There is no universe in which mackerel can be considered food.