The striated and polished surfaces are called slicken-sides.

有磨光面则称为擦面。

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

在大多数鱼类尾鳍，沿著侧与腹侧缘前部具有无鳍。在一些鱼，鰕虎鱼其有与无纹软数量比在鑑定上是有帮助。