Only the Shiver Shot has actual pectoral fins and a flat, dolphin-like forked tail.

Ease of Rigging : Rigging the Swivel Shot for fishing is pretty simple. I hook the bait like I would a minnow at the base of the head where the imaginary gills come together and then out through the top. However, if you use a small, thin wire, straight shank worm hook, you could also thread the bait onto the shank of the hook and leave the hook point protruding out the back of the bait.

It is indeed, a very effective drop shot bait.

Ease of Actuation : In the water, I let the bait dance on its own fishing it on tight line either just soaking the bait in one spot, or dragging it slowly along the bottom. I had best success just holding it there without shaking the rod tip. The bait is so small, trying to shake it around with the rod tip probably imparts too much movement for it to look natural.

But wait, there's more. Just as we were writing up this bait, Reaction Innovations sent us samples a new size with a new name.