Shorefishes of the Eastern Pacific online information system

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Species: Gobiosoma homochroma, Plain goby

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body: grey, faint bars
barbels: under front nostril

Gobiosoma homochroma (Ginsburg, 1939)

Plain goby

Body robust; head rounded; snout blunt; mouth oblique; tongue round to blunt; a small barbel below each front nostril; front nostril tubular, rear with raised rim; dorsal fin VII (none filamentous) + I, 11 (10-12) rays; anal I, 10 rays; pectoral rays 19-20; pelvics fused in disc; male genital papilla slender; female genital papilla with rounded tip; body completely scaled behind level of 2nd  ray of 2nd  dorsal, with narrowing extension forwards to inner base of pectoral; scales large, rough; 6 large, rough (but not with long spines); scales on base of tail fin; 27 lateral scales; head scaleless.

Pale grey-brown; front half speckled with dark dots; may have faint bars on top of back.

Size: 3.2 cm.

Habitat: fresh and brackish water?

Depth: 0-5 m.

Pacific entrance to Panama Canal.

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  • Brackish
  • Non Marine
  • Freshwater
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom only
  • Bottom
  • Sand & gravel
  • Soft bottom only
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Freshwater
FishBase Habitat
  • Demersal
Feeding Group
  • No Data
  • Carnivore
  • Mobile benthic worms
  • No Data
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic gastropods/bivalves
Egg Type
  • Benthic
  • Pelagic larva
  • No data
Global Endemism
  • East Pacific endemic
  • All species
  • Tropical Eastern Pacific (TEP) endemic
Regional Endemism
  • Panamic province endemic
  • All species
  • Continent
  • TEP endemic
  • Continental TEP endemic
  • Continent only
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Endangered
  • Listed
  • Not listed
Length Max
  • 3.2
Depth Range Min
  • 0
Depth Range Max
  • 5