水螅是腔肠动物门的代表动物,是中学生物教学中必备的实验材料。为了快速、省工、适时地繁殖出大量的水螅用于实验,笔者经过反复实践,摸索出了一种“藻苔贴壁法”,收到了良好效果。 Hydra is a representative animal of the coelenterate animal gate and is an essential experimental material for biology teaching in middle schools. In order to quickly, labor-savingly and timely produce a large number of leeches for experiments, the author has, after repeated practice, developed a “algae moss adhering method” and received good results.