Dascyllus trimaculatus

Pomacentridae, Dascyllus trimaculatus (Rüppell, 1828), Domino damselfish.
Well, the pictures are terrible but they're here to remind anyone snorkeling South from Fim du Mundo beach to listen carefully. You might hear a strange kind of growl, if you look around you, you'll observe that each time this sound comes, a D. trimaculatus is attacking an other fish. As far as I remember, the agressive D. trimaculatus were not living with anemones as on the photos.
Wilson reports that threespot damsellfish (from the Caribbean) "cultivates" a small algal crop and defend it vigorously by "erecting fins, striking postures, making popping or cliking sounds...". Might be that our D. trimaculatus are defending their crops !
Diving, Fim du Mundo, Nacala, Mozambique, 2006

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Last update 16/10/06
© Copyright 2006 Sophie Valtat