Speaking of Fish: or what one fish said to another

This somewhat macabre image comes from Vickie in Taiwan, a Postcrosser. She translates a Chinese proverb but a lot got lost in the translation. It is something about the two fish talking to each other on the line. One asks why the other is still laughing and the other replies because I'm lucky to still see the sky and not hang in the market. I searched the Internet but couldn't come up with any matches, so if any of you have a clue how this works please let me know.

The image is reminiscent of many fish caches in Alaska this time of year. Fish are hung and dried and smoked in the open air and the odor of smoked fish is everywhere, especially along the coastlines and river villages. Its a strong scent but after you've lived here a few years you come to expect and enjoy its pungent odor which signifies fall has arrived.