Most fishes have unstriated rays along the anterior part of the dorsal and ventral edges (leading edges) of the caudal fin.

在大多数鱼类，沿著背侧与腹侧缘前部有无条痕条。在一些鱼，鰕虎鱼其有条痕与无条纹软条数量比在鑑定上是有帮助。