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Species: Gobiosoma species B, Tail-scaled goby

All Families:   All Genera:   All Species:

dark bars: top head 2, body 7-10
D: 2 stripes
C base: bar
barbels: chin 2, front nostril 1
pectoral base: 2 spots

Gobiosoma species B

Tail-scaled Goby

Head plump, rounded; mouth oblique; snout profile very steep; narrow between eyes (< ½ eye diameter); chin with 2 barbels; front nostril with small barbel below it & small flap on its rear rim, no papilla on mid-snout; dorsal fin VII (sometimes 1st 1-2 filamentous in male) + I,11-13 (usually 12) rays; anal 9-11 (usually 10) rays; pectoral 18-21 (usually 19-20) rays; pelvics fused in disc; scales large, rough, none on head; scaling of body variable: minimum - a triangular patch on tail base + 1 short row under pectoral fin, maximum - triangular patch extends forward to under rear edge of 1st dorsal + 2 rows under pectoral fin extending back to almost meet the rear triangle, females more heavily scaled than males; 2 small rough scales on base of tail fin; row of 4 scales along tail base.

(Preserved fish) Tan to pale brown; a small spot at top rear corner of each of preopercle & operculum; a series of dark brown bars that are darkest at their edges - 2 wavy ones across top of head, 7-10 on body, (not extending onto belly, with series of short streaks at midflank), 1 on base of tail fin; pectoral with a spot at top & bottom, sometimes connected as a bar; dorsal with 2 stripes, lower narrower & stronger; anal dusky, outer edge white; pelvic dusky with 2 stripes; tail & pectoral clear to dusky.

Size: 2.1 cm.

Habitat: coastal lagoons, tidepools.

Depth: 1-10 m.

Central Baja California and both sides of the Gulf of California south to Chacala, Mexico.

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  • Brackish
  • Marine
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom
  • Bottom only
  • Soft bottom only
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Sand & gravel
FishBase Habitat
  • Demersal
Feeding Group
  • No Data
  • Carnivore
  • No Data
  • Mobile benthic worms
  • Mobile benthic crustacea (shrimps/crabs)
  • Mobile benthic gastropods/bivalves
Egg Type
  • Pelagic larva
  • No data
  • Benthic
Global Endemism
  • East Pacific endemic
  • Tropical Eastern Pacific (TEP) endemic
  • All species
Regional Endemism
  • All species
  • TEP endemic
  • Continental TEP endemic
  • Continent only
  • Cortez + Mexican provinces endemic
  • Continent
  • Resident
Climate Zone
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • North Temperate (Californian Province &/or Northern Gulf of California)
IUCN Red List
  • Not evaluated / Listed
  • Not listed
Depth Range Max
  • 10
Depth Range Min
  • 1
Length Max
  • 2.1