Aquatic animals like fish excrete their wastes in gaseous form

Aquatic animals like fish excrete their wastes in gaseous form as

  1. Oxygen
  2. Hydrogen
  3. Ammonia
  4. Nitrogen

Answer

The way in which waste product are excreted from the body of an animal depends on the availability of water to it. Aquatic animals live in water, so they excrete cell waste in gaseous form as ammonia which directly dissolves in water.

The correct option is C.