Does a fish tail make sense on a soft top? When the sea offers medium height and a bit of steepness, a fish is a good choice. Fish boards generally have little rocker – which makes it easier to generate speed in small waves. The split tail supports round turns and smooth transitions. It turns out that a fish or swallow tail works pretty well on foam boards as well! From INT to Liquid Shredder: We made a list of some of the hottest fish foamies available.