Freshwater fish are bony, so be careful when you eat them.
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China's classic farmed freshwater fish are the four domestic carps (四大家鱼): 青鱼, 草鱼, 鲢鱼 and 鳙鱼, raised together in ponds for over a thousand years. Many carp are full of fine Y-shaped bones, which is why visitors often find sea fish easier to eat.