Sea robin (gurnard)
Some sea robins have beautiful, fluorescent, winged fins. Others have terrifyingly oversized heads and bug eyes. Regardless of their oft-horrific appearances, they all make for good eating. Yet their history as bycatch means a cheap price tag, even though they're starting to show up on fine-dining menus. “Honestly, when we were growing up we called these trash fish,” says Stark. “We'd catch them all day long off the coast of New Jersey, now they're on the menu of Le Bernardin.”
The cheapest count of shrimp
“Shrimp is a supply-and-demand market,” says Shane. Every day the prices change, so unless you have a good reason to buy a specific size, the most economical option is the cheapest size per pound.