这回是西海龙王的外甥小鼍龙在黑水河为怪，把唐僧和八戒翻到河里，水性好的沙和尚有了用武之地，下水和妖怪厮杀，却无法取胜。还是悟空去找西海龙王，龙太子带虾兵蟹将捉住了鼍龙，唐僧又逃过一劼。

This time, it was the West Sea Dragon King's nephew, the Little Toad Dragon, causing trouble at the Blackwater River. He flipped Tang Seng and Zhu Bajie into the river. Sha Heshang, skilled in swimming, finally found his moment to shine, engaging in a fierce battle underwater against the demon but couldn't emerge victorious. It took Wukong's intervention to seek the West Sea Dragon King's help. The Dragon Prince, with his shrimp soldiers and crab generals, captured the Toad Dragon, allowing Tang Monk to narrowly escape danger once again.