The swim bladder can be called gelatin only after it is washed, molded, dried, oiled and dried. Swim bladder is the raw material of gelatin, and gelatin is the tonic of swim bladder. The difference between eating swim bladder directly and gelatin is that swim bladder is more difficult to digest and absorb, and it contains more active substances than gelatin, but gelatin has more nutritional deposits than swim bladder, which is difficult to preserve, and some substances with unique effects on human body need to be accumulated for many years. You can find a company on the Internet, such as Taobao, called Popular Food Supplement. The glue at home is made by fishermen themselves, which is very cost-effective. Taking gum from them can save a lot of money, and they will also teach you how to eat, what's the function and how to store it. The glue made from the swim bladder of Pseudosciaena crocea is called Jinlong glue, and the glue made from the swim bladder of Pseudosciaena crocea is called Huanghua glue. The size of large yellow croaker refers to two kinds of fish rather than one kind of fish.