A Jiangxi man by the name of Xu Hanfu tells the story of a local fisherman who trapped fish and turtles by chanting incantations over the water.
He would walk towards the water's edge chanting his mysterious incantations, and lo and behold, the waves would rise up and dump the sea creatures onto the shore. The fisherman would then stroll along picking and choosing which of the creatures he wanted to take home that day. He was careful to take only what was needed for his own consumption.
One day, just as he was about to begin his incantations at a huge lake, a creature suddenly rose from the water. It was the size of a rhesus monkey and had eyes of gold and claws of jade, and from its mouth protruded large fangs. It moved aggressively towards the fisherman and made as if to grab him. In response he covered his head with his pants. The sea monster then jumped onto the poor fisherman's shoulders and proceeded to scratch and claw at his trousered head.
Eventually the fisherman fainted and fell to the ground, blood gushing from his head. When the other people on the shore realized what was happening, they rushed over to help. At the sight of this crowd descending upon him, the sea monster cawed like a crow, jumped ten feet into the air, and made off into the sea. The people weren't keen to chase this ferocious monster, so they gave the wounded fisherman all their attention.
When he regained consciousness he explained the sea monster's attack. "This sea monster regards all the fish and turtles of the lake as his own sons and grandsons. As I have eaten his offspring, he has come to take revenge. As you can see, it has extremely sharp claws. It uses these claws to smash the skull of its prey, and that's why I put my trousers over my head.
"If you don't cover your head it will certainly kill you. In any event, I must thank you all for your help."