Hexagonal sea dragon is different from sea dragon. The difference between the two is that the horns on the head of the hexagonal sea dragon look like branches blooming, but the sea dragon doesn't look like this. Hailong is also called branchlet fish and nozzle fish. It is a bony fish, which belongs to a family Syngnathidae in zoological classification. There are about 150 species in the family Arachnidae, and some say that there are 200 species. There are 25 species of sea dragons in China. Hailong is related to hippocampus. Hexagonal Syngnathus, a marine animal, has the function of tonifying kidney and strengthening yang, which is more exciting to the body than hippocampus.