Any of several submerged plants of the genus Ceratophyllum,forming branched masses in quiet water and having finely dissected,whorled leaves and minute unisexual flowers.

• 角苔，一种金鱼藻属的水下植物，在风平浪静时会形成纵横交错的树枝网，生有轮生的多裂叶，开极小的单性花。