At the same type of gametes and meet with the special-shaped gametes fertilization methods, cells have flagella, the fusion of two gametes in the water swimming meet and achieve fertilization.

• 在同型配子配合和异型配子配合的受精方式中，性细胞都具有鞭毛，融合的两种配子可在水中游动相遇并实现受精。