You are presented with the question "What water dweller can be stimulated with amphetamines?" and the following answer choices: 
- pearls
 - algae
 - swea
 - otters
 - fish
 - humans
 - sharks
 - sponges

Now knowing that fish have a centralized nervous system with a brain and amphetamines stimulate the central nervous system, choose the best answer.


 

     fish    