Ecology Summary - Nomeus gronovii

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Main Ref.	Haedrich, R.L., 1986
Remarks	Large numbers occur in association with floating Physalia, casually swimming in and out of the tentacles and sheltering under the bell. Feeds on the tentacles and gonads of Physalia, probably other soft-bodied jellyfishes as well, also zooplankton. The mottled color pattern of the fish closely mimics the bunched and retracted tentacles. The fish is relatively immune to the toxin of the siphonophore, but none the less is on occasion killed and eaten by its host (Ref. 4777).

Main Ref.

Haedrich, R.L., 1986

Remarks

Large numbers occur in association with floating Physalia, casually swimming in and out of the tentacles and sheltering under the bell. Feeds on the tentacles and gonads of Physalia, probably other soft-bodied jellyfishes as well, also zooplankton. The mottled color pattern of the fish closely mimics the bunched and retracted tentacles. The fish is relatively immune to the toxin of the siphonophore, but none the less is on occasion killed and eaten by its host (Ref. 4777).

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 Nomeus gronovii may be found.

Habitat

Substrate
Substrate Ref.
Special habitats
Special habitats Ref.

Associations

Ref.
Associations
Associated with
Association remarks
Parasitism

Feeding

Feeding type	mainly animals (troph. 2.8 and up)
Feeding type Ref.	Haedrich, R.L., 1986
Feeding habit	selective plankton feeding
Feeding habit Ref.	Haedrich, R.L., 1986

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	3.67	0.38			Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.

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