S: 花古鱼; T: 花鼓鱼 (huā gǔ yú) or S: 花鼓鱼; T: 花鼓魚 (huā gǔ yú), Trachidermus fasciatus, the somewhat off-puttingly named rough skin sculpin, is another freshwater fish once among the most popular in China.
However, thanks to ‘development’ along the lower Yangtse river where it thrived, the fish is now endangered in China. It is still found in southern Guangxi, but in very limited numbers. Some are imported from Korea and Japan.
At the equivalent of $30 USD in markets, it is the most expensive freshwater fish I’ve encountered. I’ve never eaten it, so can’t comment on flavour. Some local restaurants have it on their menu at more than double the market price. $60+ for a fish that is only typically 11.5 cm / 4½ inches long. The OED describes it as a 'small worthless fish'.