Shorefishes of the Eastern Pacific online information system

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Species: Japonoconger proriger, Black-fin conger

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lower lip - narrow flange
D origin before pectoral base
D & A rays segmented
tail > 60% TL, tip soft, flexible
jaws: teeth in bands, upper front teeth in separate patch
pectoral base extends above gill opening

Japonoconger proriger (Gilbert, 1891)

Black-fin conger

Body moderately elongate; head and trunk < 40% of TL;body depth ~ 7.5% of TL; head length equal to trunk; eye small, half length of snout, 12% of head length; snout long,  with strongly pointed soft tip overhanging mouth by 2/3 length of eye; jaws very broad and strong, curved at rear, reaching to under rear of pupil; front nostril tubular, near tip of snout, pointing forward and down; rear nostril elliptical, in front of mid-eye; narrow flange on side of lower lip, no flange on top lip; jaws broad, curved at rear; teeth small, conical, in bands on jaws; patch of teeth on front roof of mouth long, at least ½ length of band on top jaw; patch at front of top jaws separated by a distinct gap from bands on sides of jaws; tail not attenuated, tip soft and flexible; dorsal fin origin before base of pectoral fin; dorsal and anal fin rays segmented; pectoral fin well developed, its base ending above top of gill opening; pores on top rear of head.

Light brown; all fins black, dorsal and anal with narrow white margin at rear; inside mouth, gill chamber and body cavity black, black of gill chamber visible through skin.

Size: to 35 cm.

Habitat: benthic on soft bottoms.

Depth: 55-735 m.

Gulf of Tehuantepec to central Peru.

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  • Marine Only
  • Marine
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom
  • Bottom only
  • Soft bottom only
  • Sand & gravel
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
FishBase Habitat
  • Demersal
Feeding Group
  • No Data
  • Carnivore
  • Bony fishes
  • Mobile benthic gastropods/bivalves
  • No Data
  • Mobile benthic worms
  • Mobile benthic crustacea (shrimps/crabs)
Egg Type
  • Pelagic larva
  • Pelagic
  • No data
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • All species
  • East Pacific endemic
Regional Endemism
  • All species
  • TEP endemic
  • Continental TEP endemic
  • Continent
  • Mexican + Panamic provinces endemic
  • Continent only
  • Resident
Climate Zone
  • South Temperate (Peruvian Province )
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
IUCN Red List
  • Not evaluated / Listed
  • Not listed
Length Max
  • 35
Depth Range Min
  • 55
Depth Range Max
  • 735