Saltwater fish, like the squirrelfish, live in saltwater that contains 3.5% salt. Surprisingly, the cells in the squirrelfish contain only about 1% salt, like most other living things. What explains how the squirrelfish solve this problem?

By the process of active transport and Selective reabsorption similar to that taking place in the kidney, excess salt is moved out of the cell and excreted from the body constantly to maintain a normal salt percentage within Also Osmotic pressure is constantly maintained to keep the salt concentration low.