Question

Excplain how marine fishes maintain the water content of their body at the normal level. ​

Answer 1

Answer:

See the attachment

Hope it helps

Answer 2

Marine fishes maintain normal levels of water in their body by a process called Osmoregulation.

Explanation:

Osmoregulation is the active continuous regulation of osmotic pressure.  

• Osmoregulation is a process through which the concentration of salts and minerals present in water and the body of the organism is regulated.

• The organism takes in water through mouth and most water with unwanted substances is let out through gills.

• Exchange of materials also happens by osmosis, that is the minerals and other substances travel from a place of higher concentration to a place of lower concentration (either from surrounding into the organism or from within the organism to the surrounding).

• An osmotic pressure is maintained by the organism through a selectively permeable membrane (allows passage certain substances only) which helps in maintaining Homeostasis.

Homeostasis is the stable state of internal as well as external, chemical and physical conditions in which the organism survives. The marine organisms maintain normal levels (Homeostasis) by osmoregulation