Ecology of Giuris margaritaceus
Main Ref.
Remarks Found in a variety of habitats including rivers, swamps, coastal streams and floodplains. Occurs over mud bottoms, often among dense aquatic vegetation or the cover of undercut banks. Feeds mainly on aquatic insects and nymphs, but also takes lesser amount of algae, other aquatic plants and small crustaceans. Has a pelagic marine larval stage, but adults are always found in freshwater.

Aquatic zones / Water bodies

Marine - Neritic Marine - Oceanic Brackishwater Freshwater
Marine zones / Brackish and freshwater bodies
  • supra-littoral zone
  • littoral zone
  • sublittoral zone
  • 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 Giuris margaritaceus may be found.


Substrate Ref.
Special habitats
Special habitats Ref.


Associated with
Association remarks


Feeding type plants/detritus+animals (troph. 2.2-2.79)
Feeding type Ref. Allen, G.R., S.H. Midgley and M. Allen, 2002
Feeding habit variable
Feeding habit Ref. Allen, G.R., S.H. Midgley and M. Allen, 2002
Trophic Level(s)
Estimation method Original sample Unfished population Remark
Troph s.e. Troph s.e.
From diet composition 2.64 0.20 Troph of juv./adults from 1 study.
From individual food items 2.90 0.35 Trophic level estimated from a number of food items using a randomized resampling routine.
(e.g. 346)
(e.g. cnidaria)
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