Ecology Summary - Hydatina physis

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Ecology of Hydatina physis

Main Ref.	Debelius, H., 2001
Remarks	Often found in shallow waters (Ref. 866) in weedy areas (Ref. 799). Also inhabits sand flats and rock pools (Ref. 866). Feeds on polychaete worms of the family Cirratulidae (Ref. 844).

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 Hydatina physis may be found.

Habitat

Substrate	Benthic: mobile; Soft Bottom: sand; Hard Bottom: rocky;
Substrate Ref.	Springsteen, F.J. and F.M. Leobrera, 1986
Special habitats
Special habitats Ref.

Associations

Ref.	Debelius, H., 2001
Associations
Associated with
Association remarks
Parasitism

feeding

Feeding type	mainly animals (troph. 2.8 and up)
Feeding type Ref.	Debelius, H., 2001
Feeding habit	hunting macrofauna (predator)
Feeding habit Ref.	Debelius, H., 2001

Trophic Level(s)

Estimation method	original sample		unfished population		Remark
Estimation method	Troph	s.e.	Troph	s.e.	Remark
From diet composition
From individual food items	3.06	0.26			Tentative trophic level derived from 1 + troph of a single food item
Ref.

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