Thanks, all, for some good information and advice. I think I'll go back to
the farmed. But first, I'm off to Ireland for a spell. Ever had Dublin Bay
prawns?

BTW, I should have mentioned that my cooking method was the same with both,
so that wouldn't have accounted for the toughness. I follow someone's advice
(Fruge, perhaps?) that one not cook shrimp, but just threaten them.

Felice