In the sea there are countless fish species, many of which are delicious food that everyone likes. Seawater is both salty and bitter, containing a large amount of salt, according to the measurement, seawater has not about 3.5% of the salt. The fish in the sea always drink seawater, the salt component will penetrate into the fish body, but why is the fish of the sea fish not salty or bitter?

Explaining the cause of non-salty marine fish

Why not salty sea fish? images 1

Fish living in seawater can be classified into two major types: hard bone fish and soft bone fish.

In the gills of hard bone fish, there is a special type of cell, called salt-producing cells. Salt-secreting cells can secrete salts, which can attract salt in the blood, after concentrating them into salts from the body along with viscous fluid. These salt-secreting cells always work with high efficiency, so the fish body keeps the salt content low.

The fact that soft-bone fish in seawater keep the body with low salt content is an ability. Usually in the blood of these fishes, there is a high concentration of urea, which makes the blood concentration higher than the sea level, thus reducing the penetration of salt content, so their meat is always not covered. now salty.