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Paraletharchus opercularis (Myers and Wade, 1941)
POUCHED SAILFIN-EEL
Life   Vertebrata   Fish   Ophichthidae   Paraletharchus

Paraletharchus opercularis
© Copyright Photographer/SFTEP, 2002 · 0
Paraletharchus opercularis

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Paraletharchus opercularis
© Copyright Photographer/SFTEP, 2002 · 0
Paraletharchus opercularis
espaņol

Overview
Main identification features
  • head spotted
  • body - 4 rows dark spots
  • d: margin spotted
  • chin + throat barred
  • no a
Body elongate, compressed; eye relatively small: diameter = 1/3 length of lower jaw, 3-6-5.2% of head length; head and trunk longer than tail; tail tip a hard finless point; dorsal fin high, origin on head; no anal fin; no pectoral fins; gill openings below, converging anteriorly; gill chamber a large inflated pouch; front nostril tubular, down pointing, under snout; rear nostril a slit in upper lip just before eye; jaw teeth small, pointed and close set and in single rows.

Yellow to tan; head with dense to sparse scattering of small dark spots, with 2-6 dark bands across chin and throat; body with a row of large dark spots along back just below dorsal fin, a row of smaller spots immediately above lateral line, which is translucent, and another below that line, another row along the ventral surface, those spots becoming crowded and fusing with each other posteriorly; dorsal fin white with narrow dark margin of spots.

Size: 65 cm.

Habitat: sandy bottoms.

Depth: to 10 m.

The Revillagigedos, Cocos and Galapagos.


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Northern Tropical (Mexican Province to Nicaragua + Revillagigedos); Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo).
Depth Range Max: 10 m.
Depth Range Min: 0 m.
Diet: mobile benthic crustacea (shrimps/crabs); bony fishes.
Eastern Pacific Range: Northern limit=20; Southern limit=-2; Western limit=-115; Eastern limit=-87; Latitudinal range=22; Longitudinal range=28.
Egg Type: Pelagic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: 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: 65 cm.
Regional Endemism: Island (s) only; Island (s); TEP endemic; TEP oceanic island (s) endemic; Multiple oceanic islands endemic; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Bottom; Bottom only;


Names
Scientific source:

Links to other sites

References
  • McCosker, J.E., 1974., A revision of the ophichthid eel genus Letharchus., Copeia, 1974:619-629.
  • Myers , G.S. and Wade, C.B., 1941., Four new genera and ten new species of eels from the Pacific coast of tropical America., Allan Hancock Pacific Expeditions, 9(4):65-111.
  • Walker, B. W. and Baldwin, W. J., 1964., Provisional check list of fishes of the Revillagigedo islands., 18 pp.

Acknowledgements

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


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Updated: 2024-03-28 14:11:11 gmt
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