agreed, fishy smelling calamari is a sure sign that it's over the hill.
you might try some ginger; but I would try another grocer as well.

be sure to freeze calamari the day you buy it, you won't lose any
quality by doing so, due to the high water content (arguably the same
with shrimp). just thaw in a bowl of warm water (never thaw in the
microwave! as it cooks really quickly).

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