The right answer is Damselfish
The damselfish is a species of herbivorous fish that contributes to a balance of marine plants by eating algae among corals, to prevent the proliferation of algae and to promote the growth of coral reefs. The parrotfish (Scaridae) or "coral cleaner" has the same similarity of the diet with the same equilibrium that the damselfish offers, but it can also feed on coral.
 
        
             
        
        
        
Answer:
incomplete dominance because neither allele for tail length is dominant 
I'm pretty sure 
Explanation:
googIe
 
        
                    
             
        
        
        
The small intestines give nutrients to the blood