The full sentence was:

“No other fish is so closely associated with Portugal as the cod.”

I admit, I was completely baffled. But my friends list know better. Out of 40 answers, fifteen of you got it right; so kudos to Belgian Waffle, , , , , , , , , , , and extra extra kudos to , , , and for using the correct Portuguese Bacalhau or some variant thereof. I was completely ignorant of this, I have to admit.

The next most popular answer was sardines, favoured by eleven of you (, , , , , , , , , , , and I suppose a twelfth in that made it her backup option).

and favoured tuna. and went for the anchovy. and backed the swordfish. and (and , on second thoughts) went for the Portuguese man-o’-war jellyfish even though it isn’t a fish.

I fear that the other six answers may have been jesting about this serious question, but I will give them here for completeness: : mullet (no, Michael, that’s your hairstyle): carp; : hake, in a nice cider sauce (Yummm); : The Portuguese haddock; : blue grouper; and : a herring! [sic]