Ecology of Dascyllus aruanus
Main Ref. Randall, H.A. and G.R. Allen, 1977
Marine - Neritic
  • supra-littoral zone
  • littoral zone
  • sublittoral zone
Marine - Oceanic
  • epipelagic
  • mesopelagic
  • epipelagic
  • abyssopelagic
  • hadopelagic
  • estuaries/lagoons/brackish seas
  • mangroves
  • marshes/swamps
  • rivers/streams
  • lakes/ponds
  • caves
  • exclusively in caves
Highighted items on the list are where Dascyllus aruanus may be found.
Remarks Occurs inshore (Ref. 75154). Territorial, inhabits shallow lagoon and subtidal reef flats. Forms large aggregations above staghorn Acropora thickets or in smaller groups above isolated coral heads. Feeds on plants and invertebrates (Ref. 6110). Harem-type social structure observed with 1 male & several females with linear size dependent rank order; male spawned with the females in order of rank & may attempt to male with females from nearby territories. Male & largest female protect the home territory. It is associated with coral heads (usually Acropora or Pocillopora) that have a tree-like form, allowing the fish to retreat deep within the branches. Humbug lives only where the coral heads are interspersed with sandy patches, usually in protected lagoons or sheltered bays, only occasionally on outer slopes (Ref. 54301). Diurnal species (Ref. 54980, 120737).


Substrate Ref.
Special habitats Beds: sea grass; Coral Reefs;
Special habitats Ref. Nguyen, N.T. and V.Q. Nguyen, 2006


Associated with
Association remarks


Feeding type plants/detritus+animals (troph. 2.2-2.79)
Feeding type ref Sano, M., M. Shimizu and Y. Nose, 1984
Feeding habit grazing on aquatic plants
Feeding habit ref Sano, M., M. Shimizu and Y. Nose, 1984
Trophic level(s)
Original sample Unfished population Remark
Estimation method Troph s.e. Troph s.e.
From diet composition 2.52 0.19
Ref. Sano, M., M. Shimizu and Y. Nose, 1984
From individual food items 3.35 0.42 Trophic level estimated from a number of food items using a randomized resampling routine.
(e.g. 346)
(e.g. cnidaria)
Entered by Capuli, Estelita Emily on 02.28.92
Modified by Arndt, Erik on 10.24.19
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