So I tried one of those shark tails out as a floating worm. I didn't have much time and I didn't go to a good spot, but one where I could watch the worm. It worked as well as anything else I have used. There are some differences in the Zooms I have used exclusively for this the past 30 years or so.
One, the heads are heavier on the Shark than on a Zoom. Obviously, since the tails are much smaller than the head. But the Zoom is a little more evenly balanced when you need a slow level descent. But they aren't so heavy on the Shark that they do a nose dive. I'm sure it could become better balanced, if needed, with heavier line.
Second is that tail. I like the little flips at the end of a tug. That could convince a follower to eat it. It will almost "swim" during a long slow pull.
I didn't get any love from the fish for the 25 to 30 casts I made. (3 of those were real good too) But I wasn't expecting any either. Just a quick lunch trip so I could see one in the water. But Probably the main reason it didn't get bit is because it was white, not pink.
That's a real nice worm you have there Mitch.