There is no difference. Fish glue is the dried product of fish swim bladder, also known as fish glue, and fish glue is the dried product of fish blisters, as fish blisters are fish bladders.

Fish blisters are swim bladders, an organ found in most bony fish, which are filled with oxygen, nitrogen, and carbon dioxide. Fish control their upward and downward movement in the water by contracting and expanding their swim bladders, thereby regulating the density of the fish's body. There is no difference in nature between swim bladder and fish bladder; swim bladder is a dried product of fish bladder.

Selection of fish glue notes

1, the number of years of fish glue: if the recent use of the general selection of the old fish glue, the quality of the old fish glue than the new fish glue a lot of good, the old fish glue color is more yellow, look at the meat can be divided into dark yellow, golden, etc., and there is no fishy smell. New fish glue color is more white, and fishy smell is very heavy.

2, the quality of fish glue: good quality fish glue stewed water clear, water muddy no clear quality, and basically no fishy flavor. The real fish glue no matter how long it will not rot.

3, fish glue meat, some are coarse meat, some are soft meat. Fish glue up in the light of a good place to see, you can see it inside the lines and meat, in order to judge the quality of fish glue.

The above content reference? Baidu Encyclopedia - Fish Gum