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Damselfish and Anemonefish

        
          Humbug dascyllus                           Bengal sergeant                              Princess damsel                             Australian gregory                                   Nemo                                        Pink Anemonefish
     
          Blue-green Chromis                            Yellow Damsel                               Panda Clownfish                        Blue Scribbled Damselfish                 Scissortail Damselfish               Headband Humbug

The first fossils for Damselfish were found about 54 million years ago, about the time when placental mammals were spreading over the land.
 
many are plankton feeders, often gregarious and territorial.