Monkfish known as the "poor man's lobster" - when the retailers placed it in the seafood cabinets and labelled it "monkfish" no one would buy it ( ever seen one of those things? - UGLY!!!). So, like all good marketing types do, they renamed it to something more palatable ( no pun intended). But damned if I can remember now what it was. Sales skyrocketed.
Oh, BTW, it's also known as
lawyerfish