Keywords: fin (dorsal fin), dorsal fin, shark
Sign Definition
As a Noun
                                            1.  A very large fish with sharp teeth. It sometimes attacks people. English = shark.
                                          
                                          
                                        
                                            2.  A flat object that sticks out the back of some fish. It helps the fish swim and keep its balance. English = dorsal fin.
                                          
                                          
                                        As a Verb or Adjective
                                            1.  (Of fish with dorsal fins) to travel through water close to the surface with the dorsal fin sticking out of the water.
                                          
                                          
                                         
                  
                      