As early as in Oracle Bone Inscriptions, there were records about catfish.
In the Book of Songs, a collection of poems in the Spring and Autumn Period, there is also a "bulging" poem, which means that catfish makes a "bang, bang" sound like a drum.
The Chinese alligator is recorded in Xu Shen's Shuo Wen Jie Zi in the Eastern Han Dynasty, Zhang Hua's Natural History in the Western Jin Dynasty and Li Shizhen's Compendium of Materia Medica in the Ming Dynasty.
"Nine Classics of Mountain and Sea Zhongjing Ci" Minshan, the river flows out, and the northeast flows into the sea. Among them, there are many good catfish and many catfish.
Shi Mao Wangwen Lingtai meets every drum.
The Book of Rites Moon Order is the moon in autumn. Cut jiaozi and get catfish.
Said Wen, water worms, shaped like lizards, stand on their strengths and sing by themselves.
The book Wang Hui, Zhou Shu in Jizhong, is an example. (Note: Its skin can be coronal or convex)