epifauna
noun
                                                                                                                            
                                                            epi·fau·na
                    
                                                                                                              
                                                                                                                                  ˌe-pi-ˈfȯ-nə 
                                                                                                                              
            -ˈfä-
                                                      
                                                          
                                
              
          
                                                      : benthic fauna living on the substrate (such as a hard sea floor) or on other organisms   compare infauna                                      
                
                    
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  Merriam-Webster unabridged




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