Fish glue is different from swim bladder. Fish glue is a dried product of swim bladder, which is rich in gum and used for cooking. It's called fish glue, fish belly or flower glue. It is a precious food and is very popular in Guangzhou, Hong Kong, Macao and other places. The swim bladder is an auxiliary organ of fish, which is mainly responsible for regulating the air pressure in the fish to adapt the fish to different water pressure environments. They are all related to fish, but the shape and use of fish glue and swim bladder are different.