these pictures may help to understand the question...
WP_20141101_03_17_11_Pro.jpg
WP_20141101_03_18_30_Pro.jpg
are these different patterns? or variations?
hope this helps, i would consider them variations personally, but he gave me these as an example... any suggestions at least?
he did specify "salmon fly," but if a client buys a few flies to give you as examples of a common pattern, i assume he wants them on salmon hooks...
if every cast caught a fish, it would be called "catching" not "fishing"