无风不起浪，无鱼水不深。

No wind, no waves, no fish, no deep water.

鱼塘种鲢，水瘦养草。

Silver carp is grown in fish ponds and grass is kept leanly in water.

吃鱼的不如打鱼的乐。

Fishing is better than eating fish.

好鱼常在水底游。

The best fish swim near the bottom.

不要班门弄斧。

Never offer to teach fish to swim.

不入虎穴，焉得虎子。

Go to the sea, if you would fish well.

不要混水摸鱼。

Don't fish in troubled waters.

这些谚语不仅反映了人们对自然界的观察和理解，也蕴含了深刻的哲理和生活智慧。希望这些谚语对你有所帮助。