RE: Bowfishing Targets
Also, if you happen to have an old archery target lying around (or just buy a new one; Blueridge sells one 2'-square for $15.00), cut out a fish-shape, tie it to a rock or some other type of anchor, and put it in the water about 8"-16" under the surface. You can set it deeper or more shallow to practice realistically shooting fishin the water.
Just an (inexpensive) idea...