Gizzard & Threadfin Shad .... no. They're plankton eaters (filter feeders).
Now, if you happen to have Skipjack Herring in your waters ... yes, they will hit a jig, small crank, or a live minnow.
If they're 8" long, and you don't want to or can't get them with a cast net ... you might consider a frog gig