my experience is matching the bait size and sight-fishing is much more productive than being different and unnatural.
In jetty blackwater loaded with 1" baitfish, king mackerel will eat 1" live shrimp (or flies), because it's the right size.
7 kings and countless smacks one morning just like this at S. Padre jetties between shrimp and flies.
A similar fly rod day in surf blackwater sight-fishing daisy-chain specs. Wanting to cast the fly rod out, but it was counterproductive when you could daub the fly in front of visible specs surfing the calm wave crests. Less-than finger mullet were crowding your legs and all looking toward the Gulf for the bad news.
I'll add blackwater phenomena are dues paid-up high. I've had two surf blackwater days and 3 jetty blackwater days in my life. And a dozen times arrived at Cedar Bayou to find the aftermath - a million pieces of mullet bobbing in the surf and couldn't buy a strike (except hardheads) - we just turned around and went to fish the bays. The kahle hook with the steel crimp is hat karma from the 7-king-plus jetty blackwater day.
It also works in freshwater - I've caught 10-lb bass both on nickel-sized crayfish imitations and dime-sizes minnow imitations because that's what the river or creek provided.