Striped mojarra, sand perch, goat, sand brim make very good bait for almost everything. Diapterus plumiere does have soft flesh and will not take too much abuse in the baitwell or on the hook but grouper, snook, tarpon and snapper, to name a few - all love them. They have a cousin, the silver jenny, that is more populous in our area and is also great bait. They can be caught in a cast net, usually over sand bottom frequently in the surf line or just offshore. I can't tell you how to consistently find them, but if you look regularly, then you will see a pattern in the areas that they frequent. This is true of almost all bait fish. They seem to have areas that they favor over others, for whatever the reason.