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Species: Gobiosoma paradoxum, Paradox goby

All Families:   All Genera:   All Species:

body dark + ~ 7 thin pale bars
head & body pale spots
D1 male: 1st spine long
D2 12-13
Ds- stripes/rows black & white spots
head without barbels

Gobiosoma paradoxum (Günther, 1861)

Paradox Goby

Head rounded; mouth large, oblique, lower jaw heavy, slightly projecting; snout profile slopes abruptly down; narrow between eyes (< ½ eye diameter); no barbells on head; dorsal fin VII (1st spine filamentous in male) + I,12 (12-13) rays; anal fin 10-(10-11) rays; pectoral 18 (16-19) rays; pelvics fused in disc; male genital papilla slender, pointed; body scaly behind level of middle of soft dorsal, with triangular extension of scaly area forward along mid-flank to a level between the front of the soft dorsal & the middle of the spiny dorsal, usually an isolated oblong patch of scales under the pectoral; 13-20 rows of mid-lateral scales; 4-6 large, rough scales on base of tail fin.

Head and body dark grey-brown to reddish, with many small pale spots; head with 3 small black spots - behind eye, at top-rear of preopercle & of operculum); upper body with 5-8 faint bars; flank with series short black dashes; Male with fins dark to black, with 3 black bands & white 1st spine on 1st dorsal, 2 black bands on 2nd dorsal, anal dark with white tip, pelvic margin white. Female 2 oblique black bands from eye down below bottom jaw, oblique black bands on lower preopercle and opercle to throat, dorsals with 3 lines of black spots; tail with 6-7 wavy dark bars; pectoral & pelvic with faint bars.

Size: 4.7 cm.

Habitat: rocky and rubble bottoms.

Depth: 0-5 m.

The mouth of the Gulf of California to Ecuador.

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  • Non Marine
  • Brackish
  • Inshore
  • Inshore Only
Water Column Position
  • Bottom only
  • Bottom
  • Reef (rock/coral/oyster)
  • Estuary
  • Reef associated (reef + edges-water column & soft bottom)
  • Mud
  • Reef and soft bottom
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Rocks
  • Sand & gravel
  • Mangrove
FishBase Habitat
  • Reef Associated
Feeding Group
  • Carnivore
  • No Data
  • Mobile benthic gastropods/bivalves
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic worms
  • No Data
Egg Type
  • Benthic
  • No data
  • Pelagic larva
Global Endemism
  • All species
  • Tropical Eastern Pacific (TEP) endemic
  • East Pacific endemic
Regional Endemism
  • Continental TEP endemic
  • Continent
  • Continent only
  • 3 provinces (Cortez + Mexican + Panamic) endemic
  • TEP endemic
  • All species
  • Resident
Climate Zone
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
IUCN Red List
  • Listed
  • Least concern
  • Not listed
Length Max
  • 4.7
Depth Range Min
  • 0
Depth Range Max
  • 5