Get over it

Maybe they missed EVERY science class EVER!

Mistakes happen in the house, but the house owner calls a rabbi and the mistake is rectified. Mistakes happen in business, but many business cover up their mistakes since it means money. Hopefully here, it was just a mistake and not a scheme to make more money.

Oh dear now the good calamari has gone to waste because it fell in to the hands of the haredi puplic

Sea products aren't "contaminated" by contact. So just sell them to some TA restaurant. They are very good once fried.

It looks like the frozen calamari was shrinkwrapped in heavy plastic, so any unopened cod or calamari would not have been contaminated. It would take only one package being opened to figure out that this was a mistake and no major problems were created. This is a non-issue.

Anyone ever worked at a kosher restaurant? Except for the most obvious violations such as cooking pork, there is little supervisors can do to keep anything kosher but thanks for suspending your disbelief.