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Opistognathus galapagensis Allen and Robertson, 1991
GALAPAGOS JAWFISH
Life   Vertebrata   Fish   Opistognathidae   Opistognathus

Opistognathus galapagensis
© Copyright Ross Robertson, 2006 · 12
Opistognathus galapagensis

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Opistognathus galapagensis
© Copyright Roger Steene, 2006 · 0
Opistognathus galapagensis
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Overview
Main identification features
  • 6 brown bars + flank stripe
  • d: black and white blotch at front
Dorsal rays XI, 15-17; anal rays III, 15-17; pectoral rays 21; 1-2 teeth at front of roof of mouth; gill rakers on first arch 30-37; a multi-branched cirrus at front nostril; body with 83-112 oblique scale rows; rear end of top jawbone straight, no extension in male; upper jaw 71.1-80.0% of head length; lips without inner papillae; a broad flap under opercle.

Whitish or pale tan; body with six irregular brown bars, the middle portion of bars somewhat expanded and may coalese to form a longitudinal stripe; six large brown blotches, corresponding with each bar, on back and extending on to dorsal fin; a prominent black spot on distal part of first three dorsal spines and a nearly equal sized white patch immediately below; no obvious color inside mouth.

Size: reaches at least 16 cm.

Inhabits sand-rubble areas.

Depth: 5-15 m.

Galapagos Islands and the coast of Costa Rica.


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo).
Depth Range Max: 15 m.
Depth Range Min: 5 m.
Diet: bony fishes; mobile benthic crustacea (shrimps/crabs); mobile benthic gastropods/bivalves.
Eastern Pacific Range: Northern limit=9; Southern limit=-2; Western limit=-93; Eastern limit=-84; Latitudinal range=11; Longitudinal range=9.
Egg Type: Brooded; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Reef associated (reef + edges-water column & soft bottom); Sand & gravel; Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Soft bottom only.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 16 cm.
Regional Endemism: Island (s); Continent; Continent + Island (s); TEP endemic; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Bottom; Bottom only;


Names
Scientific source:

Links to other sites

References
  • Allen , G.R. and Robertson, D.R., 1991., Quatre especes nouvelles d'Opisthognathidae (Jawfishes) du Pacifique oriental tropical., Revue Francaise de Aquariologie, 18(2):47-52.
  • Bussing, W.A and Lavenberg, R.J., 2003., Four new species of eastern tropical Pacific jawfishes (Opistognathus: Opistognathidae)., Rev. Biol. Trop., 51:529-550.

Acknowledgements

I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.


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Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Opistognathus galapagensis Allen & Robertson , 1991

Galapagos jawfish Upload your photos  and  videos
Pictures | Google image Image of Opistognathus galapagensis (Galapagos jawfish) Opistognathus galapagensis
Picture by Robertson, R.

Classification / Names Common names | Synonyms | Catalog of Fishes ( gen. , sp. ) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Opistognathidae (Jawfishes)
Etymology: Opistognathus: Greek, opisthe = behind + Greek, gnathos = jaw (Ref. 45335 ) .

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; demersal; depth range ? - 10 m (Ref. 58018 ).   Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Southeast Pacific: Galapagos Islands.

Size / Weight / Age

Maturity: L m   ?   range ? - ? cm
Max length : 16.0 cm TL male/unsexed; (Ref. 11482 )

Biology     Glossary (e.g. epibenthic)

Inhabits sand-rubble bottoms. Feeds on benthic and planktonic invertebrates. Mouthbrooders (Ref. 240 ).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Employ mouthbrooding to care for their young (Ref. 240 ).

Main reference Upload your references | References | Coordinator | Collaborators

Allen, G.R. and D.R. Robertson , 1994. Fishes of the tropical eastern Pacific. University of Hawaii Press, Honolulu. 332 p. (Ref. 11482 )

IUCN Red List Status (Ref. 120744 )

  Least Concern (LC)  ; Date assessed: 24 May 2007

CITES (Ref. 118484 )

Not Evaluated

CMS (Ref. 116361 )

Not Evaluated

Threat to humans

  Harmless




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Estimates based on models

Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high]. Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245 ). Trophic Level (Ref. 69278 ):  3.5   ±0.41 se; Based on food items. Resilience (Ref. 120179 ):  . Vulnerability (Ref. 59153 ):  Low vulnerability (10 of 100) .

Entered by Garilao, Cristina V. Modified by Garilao, Cristina V. Fish Forum
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