Seika Pro Frequency Shad (Bloody Belly) The Seika Pro Frequency Shad is ideal for zander and perch anglers. The slim shape and the small plate tail of this shad ensure a passive but high-frequency action, which is what they like. The Frequency Shad is particularly successful in fast currents, but this shad also acts like a zander magnet in still water. Compared to other shads in a similar shape, the Seika Pro Frequency Shad achieves significantly greater casting distances. Content: 1 piece.