Yes, the translucent substance covered with fresh fish glue is fish oil. Generally, there are three kinds of fish glue without that layer of fish oil: one is the fish glue that has been stored for a long time. With the passage of time, the fish oil layer on the surface of the fish glue gradually evolved into a colloidal layer and became opaque; Secondly, the use of chemical washing in the washing and drying process of fish glue not only shortens the production time of fish glue and beautifies its appearance, but also has negative effects on human body; Third, because there are many kinds of swim bladder, there is no layer of fish oil when the fish glue is dry. You can find a company on the Internet, such as Taobao, called Popular Food Supplement. This fish glue is made by fishermen themselves, which is very cost-effective. Taking fish glue from them can save a lot of money, and they will also teach you how to eat, what is the function of eating and how to store it.