You are presented with the question "Crustaceans breathe what through their gills?" and the following answer choices: 
- matter
 - water
 - saliva
 - gametes
 - semen
 - liquid
 - oxygen
 - air

Now knowing that gills are used for breathing water by aquatic animals and crustaceans are predominantly aquatic, breathing by means of gills, choose the best answer.


 

  water       