Fish float yú piāo

When fishing, a fishing device tied to the line can float and prevent the fishhook from sinking to the bottom. When the fish float sinks, you will know that a fish has been hooked

Fish bladder yú biào

The white sac-like organ in the fish belly, which can regulate the floating and sinking of the fish

Refers to the white sac-like organ in the fish that can expand and contract. It is filled with Mixed gases such as nitrogen, oxygen, and carbon dioxide. The fish sinks when it contracts and floats when it expands

Sorry, "fish fat" is not yet included in the Han Code.