“Many Heimishe fishmongers sell fish from British Columbia (I think)with a cert from a Mashgiach that he saw the fish alive.”
You mean the mashgiach is on the fishing boat and eyeballs and tags each fish before they take their last breath? Sounds very fishy.
Is there an extra charge for this service? I wish that I would have thought up this chumra first.
And what does seeing the fish alive in British Columbia have to do with the fish’s kosher status in Williamsburg?