Ecology Summary - Hypsoblennius gentilis

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Main Ref.	Stephens, J. Jr., R. Johnson, G. Key and J. McCosker, 1970
Remarks	Found in intertidal shallows (Ref. 11482) but restricted to deeper waters (17-26 m) near Cabo San Lucas. Inhabits bays and nearly estuarine waters. Sympatric with H. jenkinsi and H. gilberti but dominant only in newly developed and transient habitat. Moves to Zostrea beds when their transient habitats are disturbed (Ref. 56052). Territorial (Ref. 37955) particularly the males guarding eggs defending even against the females which spawned it. They exhibit a less developed gular display than H. jenkinsi which is more territorially aggressive. The two species occupy much similar areas and actively competes for space, H. gentilis more often loses to H. jenkinsi. Exhibits odd feeding behavior of hanging vertically in midwater during its feeding period (Ref. 56052). Feeds on small benthic invertebrates and algae (Ref. 37955). Predators of Hypsoblennius include Pralabrax clathartus, Pralabrax maculatofasciatus, Heterostichus rostratus, and Scorpaenichthys marmoratus. Other fishes living in the same area include: Paraclinus integripinnis, Gibbonsia elegans (Ref. 56052).

Main Ref.

Stephens, J. Jr., R. Johnson, G. Key and J. McCosker, 1970

Remarks

Found in intertidal shallows (Ref. 11482) but restricted to deeper waters (17-26 m) near Cabo San Lucas. Inhabits bays and nearly estuarine waters. Sympatric with H. jenkinsi and H. gilberti but dominant only in newly developed and transient habitat. Moves to Zostrea beds when their transient habitats are disturbed (Ref. 56052). Territorial (Ref. 37955) particularly the males guarding eggs defending even against the females which spawned it. They exhibit a less developed gular display than H. jenkinsi which is more territorially aggressive. The two species occupy much similar areas and actively competes for space, H. gentilis more often loses to H. jenkinsi. Exhibits odd feeding behavior of hanging vertically in midwater during its feeding period (Ref. 56052). Feeds on small benthic invertebrates and algae (Ref. 37955). Predators of Hypsoblennius include Pralabrax clathartus, Pralabrax maculatofasciatus, Heterostichus rostratus, and Scorpaenichthys marmoratus. Other fishes living in the same area include: Paraclinus integripinnis, Gibbonsia elegans (Ref. 56052).

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 Hypsoblennius gentilis may be found.

Habitat

Substrate	Benthic; Hard Bottom;
Substrate Ref.	Stephens, J. Jr., R. Johnson, G. Key and J. McCosker, 1970
Special habitats	Beds: bivalve; Other habitats: burrows; pilings; boat hulls;
Special habitats Ref.	Stephens, J. Jr., R. Johnson, G. Key and J. McCosker, 1970

Associations

Ref.
Associations
Associated with
Association remarks
Parasitism

Feeding

Feeding type	plants/detritus+animals (troph. 2.2-2.79)
Feeding type Ref.
Feeding habit
Feeding habit Ref.

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	2.71	0.24			Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.

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