"Fishing flies" refers to artificial lures or baits that are designed to imitate insects or other small creatures to attract fish when trying to catch them. Full definition
The table is fabulous... right down to the pretty hand tied fishing flies on the napkin rings!!! (vignettedesign.net)
Woman in the Ashes is the sort of novel in which fish fly through the air, the soil bears the footprints of angels, and a bundle of animal pelts hides a deep abyss. (bookpage.com)
You tend to run into fewer flying friends when you're swimming with the fish (blackbirdresort.com)