Overview

Comprehensive Description

Description

Common names: jawfish (English), bocón (Espanol)
 
Opistognathus panamaensis Allen & Robertson, 1991


Panamanian jawfish

Elongate, compressed, tapering body; large bulbous head; eye large, high; no cirrus at front nostril; rear end of top jaw straight, without rear fringe; upper jaw 51-53% of head length, same size in both sexes; lips with papillae inside; center of roof of mouth with 1-4 teeth; gill rakers  37; no broad flap below operculum; dorsal rays XI, 13-14; anal rays II, 13-14; pectoral rays  20; tail rounded, much shorter than head; lateral line on front half of body only, high; scales small, smooth, none on head,  76-78 oblique scale rows.



Very similar in coloration and habits to  O. rosenblatti; body and orsal and caudal fins generally bright yellow and the blue spots on the body sometimes coalesce to form stripes; no obvious color pattern inside mouth.


Size: reaches about 10 cm.

Inhabits burrows in sand-rubble areas.

Depth: 5-25 m.

Costa Rica to Colombia, Isla del Coco and Malpelo.

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Biology

Inhabits burrows in sand-rubble areas. Feeds on benthic and planktonic invertebrates.
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Distribution

Range Description

This species is endemic to the Eastern Pacific, and is found from Costa Rica to Colombia, including Cocos Island and Malpelo Island.
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Depth

Depth Range (m): 5 (S) - 25 (S)
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Zoogeography

See Map (including site records) of Distribution in the Tropical Eastern Pacific


 
Global Endemism: All species, East Pacific endemic, Tropical Eastern Pacific (TEP) endemic

Regional Endemism: All species, TEP endemic, Continent + Island (s), Continent, Island (s)

Residency: Resident

Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)

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Eastern Central Pacific: Cocos Island, Panama, and Malpelo Island.
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Physical Description

Morphology

Size

Length max (cm): 10.0 (S)
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Size

Maximum size: 100 mm NG
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Max. size

10.0 cm TL (male/unsexed; (Ref. 11482))
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Type Information

Holotype for Opistognathus panamaensis Allen & Robertson
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): G. Allen & D. Robertson
Year Collected: 1990
Locality: Isla Uva, Gulf of Chiriqui, Panama., Panama, Pacific
Depth (m): 5 to 12
  • Holotype: Allen, G. R. & Robertson, D. R. 1991. Revue Francaise d'Aquariologie, Herpetologie. 18 (2): 52, 11.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This demersal species inhabits burrows in sand-rubble areas. This species has been observed at depths of 5 to 40m (in Malpelo) and up to 110m in Cocos Island.

Systems
  • Marine
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Depth range based on 7 specimens in 1 taxon.
Water temperature and chemistry ranges based on 2 samples.

Environmental ranges
  Depth range (m): 1.35 - 33.5
  Temperature range (°C): 26.928 - 27.485
  Nitrate (umol/L): 2.498 - 5.562
  Salinity (PPS): 33.044 - 33.371
  Oxygen (ml/l): 4.243 - 4.602
  Phosphate (umol/l): 0.409 - 0.628
  Silicate (umol/l): 2.926 - 4.148

Graphical representation

Depth range (m): 1.35 - 33.5

Temperature range (°C): 26.928 - 27.485

Nitrate (umol/L): 2.498 - 5.562

Salinity (PPS): 33.044 - 33.371

Oxygen (ml/l): 4.243 - 4.602

Phosphate (umol/l): 0.409 - 0.628

Silicate (umol/l): 2.926 - 4.148
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Habitat

Salinity: Marine, Marine Only

Inshore/Offshore: Inshore, Inshore Only

Water Column Position: Bottom, Bottom only

Habitat: Reef associated (reef + edges-water column & soft bottom), Soft bottom (mud, sand,gravel, beach, estuary & mangrove), Soft bottom only, Sand & gravel

FishBase Habitat: Demersal
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Environment

demersal; marine; depth range 12 - 12 m (Ref. 58018)
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Trophic Strategy

Inhabits burrows in sand-rubble areas. Feeds on benthic and planktonic invertebrates. Planktivore (Ref. 57615).
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Feeding

Feeding Group: Planktivore

Diet: zooplankton, pelagic fish eggs, pelagic fish larvae, bony fishes
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Life History and Behavior

Reproduction

Reproduction

Egg Type: Brooded, Pelagic larva
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
McCosker, J., Bessudo, S., Collette, B., Rojas, P., Acero, A.

Reviewer/s
Carpenter, K., Polidoro, B., Livingstone, S. (Global Marine Species Assessment Team)

Contributor/s

Justification
This species is found in Costa Rica, Panama and Colombia, and is common in at least some parts of its range. There are no major threats for this relatively deepwater species, and no current indication of population decline. It is listed as Least Concern.
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Conservation status

IUCN Red List: Not evaluated / Listed

CITES: Not listed
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Population

Population
This species is common in both Malpelo, Gorgona and Cocos islands, as well as along the Gulf of Chiriqui and Costa Rica.

Population Trend
Unknown
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Threats

Threats

Major Threats
Collection for the aquarium trade may represent a future threat.
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Least Concern (LC)
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Management

Conservation Actions

Conservation Actions
There are no known specific conservation measures for this species. However, this species distribution falls partially into a number of Marine Protected Areas in the Eastern Pacific region (WDPA 2006).
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