All the fish in the ocean have their own "desalter", which can discharge the salt in seawater in time. Moreover, this kind of "desalter" is different between bony fish and cartilaginous fish, but its function is the same, so marine fish is not salty. Marine fish itself has no salty taste. The teleost fish living in the ocean have a strong ability to discharge salt. In addition to a small amount of salt in the kidneys, they also have special organs that excrete salt, that is, chlorine secreting cells located in gills. Chlorine-secreting cells are like a seawater desalination workshop, which can desalinate seawater efficiently.