< Back to Fish Birthday Cake Instructions DLTK's Crafts for KidsPhotos of Our Fish Birthday Cake Back two round cakes. Trim the bulging top off the cakes. arrange tail template on one of the cakes and cut out. arrange mouth template on the other cake and cut out. arrange top fin template on the remains of the cake you cut the tail from and cut out. arrange the bottom fin template on the remains of that (the top fin) and cut out Arrange all the pieces in a fish shape. Do a quick crumb coat with plain icing. Ice your cake. You can do it all one color or get more fancy (I used a separate color for the tail and fins). I used a small glass to hold the circle of white icing where the eyeball would be... You can also cut a marshmallow and lay that on top for the eye. And you're done! Template