Shorefishes of the Eastern Pacific online information system

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Species: Apterichtus equatorialis, Equatorial finless-eel

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snout sharp, overhanging
eyes minute
no fins
tail tip = hard point
nostrils: rear = a slit on lip, front tubular

Apterichtus equatorialis (Myers & Wade, 1941)

Equatorial finless-eel

Body elongate, cylindrical, pointed at both ends, entirely finless; head and trunk a little shorter than tail; snout pointed, conical, overhanging, underside flattened and grooved; eye moderately developed; front nostril tubular, rear one a horizontal slit along top lip edge or entirely outside mouth before a lip flange; gill openings below, converging forward; teeth pointed, in single rows on jaws; tail tip a hard finless point; lateral line complete, lines of each side of head connected by 2 canals with across top of head.

Pale creamy yellow, with small, irregular brown spots on head and a brown stripe along mid-side.

Size: grows to at least 30 cm.

Habitat: sandy bottoms.

Depth: 15-145 m.

The Gulf of California to Ecuador.

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  • Marine
  • Marine Only
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom only
  • Bottom
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Sand & gravel
  • Reef associated (reef + edges-water column & soft bottom)
  • Soft bottom only
FishBase Habitat
  • Demersal
Feeding Group
  • No Data
  • Carnivore
  • Mobile benthic crustacea (shrimps/crabs)
  • No Data
  • Bony fishes
Egg Type
  • Pelagic
  • Pelagic larva
  • No data
Global Endemism
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
  • All species
Regional Endemism
  • Continent + Island (s)
  • Continent
  • Island (s)
  • TEP endemic
  • All species
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
IUCN Red List
  • Least concern
  • Listed
  • Not listed
Length Max
  • 30
Depth Range Min
  • 15
Depth Range Max
  • 145