Shorefishes of the Eastern Pacific online information system

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Species: Erotelis armiger, Armiger's goby, Flathead sleeper

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head flattened, eyes on top
C: broad, many short spines top & bottom of base
scales small, smooth



Erotelis armiger (Jordan & Richardson in Jordan, 1895)

Flathead sleeper, Armiger's goby

Body elongate, robust; head depressed, wide; eyes on top of head; snout short, blunt; mouth oblique; teeth small conical, in several rows on jaws; preoperculum with concealed hook at its lower rear corner; gill membranes broadly joined to throat, with 6 rays; 2 separate dorsal fins, VI weak spines + I, 13, base of 2nd dorsal < distance from the end of that base to tail fin; anal fin with I, 12; pelvic fins I, 5, long, completely separate; tail fin broadly rounded, with many short but obvious, spiny rays at the top and bottom of its base; scales small, smooth, 90-110 in lateral series; head with very small scales; no lateral line.

Dark brown, paler below; covered with fine black dots; dorsals with pale membranes, rays with black bars; tail dusky brown; anal, pelvics and pectorals speckled, pectoral with dark base.

Size: 12.5 cm.

Habitat: soft bottoms.

Depth: 0-5 m.

The lower Gulf of California to Colombia.

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Species Data Create Report Export as Word File Export as Excel File
  • Non Marine
  • Freshwater
  • Brackish
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom only
  • Bottom
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Sand & gravel
  • Soft bottom only
  • Freshwater
  • Mud
  • Estuary
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • No Data
  • Bony fishes
  • Data
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
Egg Type
  • Pelagic larva
  • Benthic
  • No data
Global Endemism
  • Tropical Eastern Pacific (TEP) endemic
  • All species
  • East Pacific endemic
Regional Endemism
  • Continental TEP endemic
  • TEP endemic
  • All species
  • Continent only
  • Continent
  • 3 provinces (Cortez + Mexican + Panamic) endemic
  • Resident
Climate Zone
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
IUCN Red List
  • Listed
  • Data deficient
  • Not listed
Length Max
  • 13.4
Depth Range Min
  • 0
Depth Range Max
  • 5